Resources for Flow Tube

Welcome to Flow Tube Answers

Open Question: Why does liquid iodine solidify if it is tilted in a tube?

Iodine was slowly heated and is liquified. If the tube it is sealed in is tilted, the iodine flows down the tube as a narrow stream and solidifies very quickly. Why? more

Open Question: I need some help in biology please?

2. What is the function of collenchyma cells? A. To store starch, oils, and water for the plant B. To provide support while allowing the plant to grow C. To transport materials through long strands D. To connect different types of cells 3. The function of the vascular tissue is to A. secrete a substance that becomes the cuticle. B. cover the outside of a plant and protect it. C. provide support and supply materials. D. transport water and nutrients to all parts of the plant. 4. Cohesion is a result of hydrogen bonds that form between A. water molecules. B. water and the xylem wall. C. tracheid cells. D. vessel elements. 5. Figure 21.1 shows a root tip. What are the protective cells at the very tip of the root called? A. meristem. B. root cap. C. vascular cylinder. D. root hairs. 6. Transpiration lowers the pressure in the leaf xylem, creating a vacuum that A. forces water out of leaves. B. pulls water upward. C. attracts water to the xylem wall. D. moves water into the phloem. 7. In the pressure-flow model, sugar is pumped into the phloem, and water flows into the phloem through A. the stomata. B. the sap. C. active transport. D. osmosis. 8. Roots absorb water partly through tiny extensions of dermal cells called A. lateral meristems. B. apical meristems. C. vascular cylinders. D. root hairs. 9. Which type of tissue makes up most of the inside of a plant? A. Dermal B. Ground C. Vascular D. Phloem 10. Figure 21.2 shows a cross section through a tree. Which tissue makes up the dark rings? A. Phloem B. Xylem C. Vascular cylinder D. Meristem 11. The blade of a leaf is connected to the stem by a thin stalk called a A. mesophyll. B. cuticle. C. bud. D. petiole. 12. The functions of plant stems include providing support, transporting water and materials, and A. taking up water from soil. B. forming a vascular cylinder. C. storing food and water. D. exchanging gases. 13. Which leaf adaptations occur to minimize water loss in both deserts and cold dry climates? A. Plump leaves that store water B. Large and broad leaves C. Needles and spines D. Compound and double compound leaves 14. The upper surfaces of leaves are used mainly for A. light gathering. B. gas exchange. C. collecting water. D. protection from predators. 15. For what group of plants is water loss not a problem? A. Desert plants B. Aquatic plants C. Cold-climate plants D. Dry-climate plants 16. Which type of cell is found in the hard or gritty parts of fruits and vegetables? A. Collenchyma B. Sclerenchyma C. Parenchyma D. Plasmodesmata 17. Dead parenchyma cells that make up bark form a type of A. collenchymal tissue. B. vascular tissue. C. dermal tissue. D. ground tissue. 18. Water moves up from a plant’s roots through cells in the xylem that A. act like tiny pumps. B. carry sugar to the roots. C. have matured and died. D. have no cell walls. 19. Phloem tissue is made up mainly of A. xylem cells and stomata. B. dead cells and sugar sinks. C. vessel elements and tracheids. D. sieve tube elements and companion cells. 20. Root hairs anchor plants and help them absorb water and minerals by A. protecting the growing part of the root. B. producing more xylem and phloem. C. increasing the root’s surface area. D. lengthening the tips of roots. 21. What are the two basic forms of roots? A. Fibrous roots and taproots B. Long taproots and short taproots C. Fine-branched roots and thick-branched roots D. Vascular cylinders and meristems 22. What can you infer from a thick annual ring inside a thin annual ring in a tree trunk? A. Low precipitation followed by high precipitation B. A short spring followed by a very cold winter C. Secondary growth followed by primary growth D. Good conditions followed by harsher conditions 23. Most leaves have a broad, flat part called a A. Blade B. Petiole C. Stem D. Leaflet 24. Which of the following helps reduce water loss? A. blade B. petiole C. stem D. stomata more

Open Question: i need some help in biology please?

Open Question: solana protein skimmer problems?

i have a solana tank for almost a year now, the problem is that i have never had micro bubbles at all in my skimmer....i have the tube fully submerged int he tank sucking water but when i take the tube out is when i see the bubbles over flowing, am i suppose to have the tube suck up a little air and water ? there has also been build up it looks like in the back of the tank, which im suppose to be cleaning out once a month im told more

Open Question: Aquarium ext filter, does it need special tubes?

I have recently acquired a Hydor Prime 30 for my tank, but it has no tubes for water flow in and out, does it require special tubes, or will a piece of hose suffice? more

Open Question: determine the maximum velocity of the flow in a given cross section of a tube?

determine the maximum velocity of the flow in a given cross section of a tube tube inner diameter = 0.003m blood viscosity = 0.0035 Ns/m^2 blood density = 1060 kg/m^3 mean velocity = 0.04m more

Open Question: Hydraulics question: flow in horizontal tube with a valve?

The water from a reservoir leaves through a 20m long, 24cm in diameter horizontal tube that has an open end in the air. The entry into the tube is located 4m below the surface of the reservoir. 1m from the end of the tube there is a valve that is 21cm closed (out of 24 cm diameter of the tube). The Roughness coefficient K_s_ =90m^(1/3)/second. Please help understand how I should go about determining the water flow in the tube, and average velocity in the section of the valve. Really appreciated! more

Voting Question: What is the slowest burning liquid that I can buy anywhere?

Okay so I have this science experiment where I have to keep a flame burning on a small device for as long as possible. I need to know what flammable 100% liquid (not paste/solid) is available that burns the longest, and how long will it burn? (it needs to be fluid because it has to flow through a tube) more

Voting Question: Accounting...please helppp?

Analyze each transaction, using T-form January 3: sold $100,000 in products to Flex Tube on account; terms 2/10, n/30 January 4: sold $400,000 of rigid ductwork to Constant Flow, terms 5/10, n/25 January 6: Constant Flow called and said $50,000 was defective and needed to return goods; we gave them return acknowledgement January 7: Air Flow purchased $200,000 in products; we shipped and billed; terms n/30 January 8: Received returned items from Constant Flow and issued credit memo. more

Voting Question: Accounting Help....pleaseeee?

January 3: sold $100,000 in products to Flex Tube on account; terms 2/10, n/30 January 4: sold $400,000 of rigid ductwork to Constant Flow, terms 5/10, n/25 January 6: Constant Flow called and said $50,000 was defective and needed to return goods; we gave them return acknowledgementI need to analyze each transaction using T forms. more

Open Question: Compilation "CM"- GEN. INFO. Resource Page, for "NEWBIES": all Regular PATRONS, please HELP?

As many if not most regular patrons of this CM forum do, I love this genre; it's been and continues to be a main-stay of my life: an abiding interest, and a resource for spiritual rejuvenation and succor, which never fails me. And I want to propitiate, promote its appreciation in any way that I can. The perpetual in and out flow of "Newbies" to this forum, presents such an opportunity. To take advantage of this, I'm compiling a CM.-GEN. INFO, Resource Page for their utilization; and am here requesting any of you Regular Patrons for aid/assistance/input in its design, and resource recommendations(it's meant to be easily accessible for posting as a response to any relevant inquiry). The following is the basic outline I've come up with so far: (1) "where can I get FREE sheet music for (whatever type of instrument, say, "piano"(or orchestral score)?": LINK (repeat - FREE)??????? (2) "where can I find info. about--------------Mozart; Beethoven; Bach; etc., etc.; or any general information about CM?": I always provide this LINK: http://en.wikipedia.org/wiki/Classical_music_(disambiguation) (3) "where can I listen to classical music for FREE?" I always reference You Tube: http://www.youtube.com/watch?v=EToY-LCDY08 (4) "where can I download mp3?" LINK ??????? There are often other requests, for which I'm going to rely upon you who are much more knowledgeable than I to recommend. This project is only in genesis form, obviously; so please, PLEASE, feel free to recommend any and all alterations/additions, you might consider to more helpful than the resources I've listed. And if any of you should wish to resume responsibility for it, such a Project, again, PLEASE, feel free to inform me; I will be most happy to turn it over to you and/or assist you in anyway that I can. Thank you, Alberich more

Voting Question: Fluid mechanics. Calculate the Reynolds number for the flow of 325L/min of water at 10 degrees Celsius in a?

standard 2-inches steel tube with a wall thickness of 0.065-inches, is the flow laminar or turbulent. Diameter = 52.5mm, fluid viscosity(n) = 1.75 x 10^-3 Pa.s. more

Resolved Question: resistivity of salt water solution?

When current flows in an ionic solution, both negative and positive ions are charge carriers. In the dilute limit, the resistivity of the solution is inversely proportional to the concentration. For example, the resistivity of salt water solution at 25 °C is ρ = 8.0645/[NaCl] Ω·cm·mol/L, where [NaCl] is the concentration of salt in the water, in moles per litre. Calculate the resistance of a cylinder of salt water (in a plastic tube) with radius r = 1.30 cm, length L = 11.30 cm, and [NaCl] = 0.25 mol/L. I don't know how to do this, could anyone help me? more

Voting Question: How do I vent my wood stove?

I bought a little wood stove to heat my very cold workshop. Yesterday morning I plumbed in the exhaust tubing and fired it up to see how it would perform. 3 minutes into the test burn, I had smoke pouring out of every joint in the stove, and every joint along the tubes, the adhesive from the metal duct tape was melting and bubbling, and my smoke alarm blaring. Needless to say, I grabbed the bucket of water I had next to me (just in case) and extinguished the fire immediately. Then I lit another fire - my ciggarette, and idly dragged on it, staring at the thing, pi$$ed off and confused. I have looked into some forums on the subject since this event, and have some thoughts on what went wrong. I have some inklings on the solution, and would like some outside corroboration, before I go and buy more stuff. 1. I used the wrong pipe. - The vent portal in the back of the stove is 6 inches. I stuck a 90 degree elbow on the portal, and immediately put on a 6" to 4" reducer (stupid me trying to saved a few bucks by using the smaller ducting). I suspect the large diameter is needed to handle the heat and smoke. By constricting the flow, the smoke had nowhere to go, and so burst out of every pore. 2. I used single wall galvenized HVAC pipe. - the galvenization started burning off. I understand now I should use stainless steel pipe with heat resistant paint. I will definitely do that, but what about the single wall / double wall issue? Is the extra wall just for insulation, or does it do anything to mitigate smoke and toxic gasses? 3. Hieght. The smoke stack goes 10 feet up the interior brick wall, elbows 90 degrees horizontal into a hole I cut in the plastic warehouse windows (yes, it is insulated properly. I did THAT right). Outside the shop, the pipe elbows 90 degrees back to vertical, and instantly truncates into the vent - perhaps 12 feet up above the side walk. I understand significant height is needed to create proper draft. Everyone says "the higher, the better". OK, great, but really, HOW high does the Chimney NEED to be? 4. Is bare pipe (whether single wall or double walled) acceptable for an exterior chimney on the side of a brick building? I've checked the forums, they give a lot of general advice. I need specifics. Help me out. more

Voting Question: how to drip acclimate my saltwater fish?

can i drip acclimate my saltwater fish using air tubing? i as told to suck the water through then put a strong peg or something to slow the water flow down to drips? will this work ? wont the water pressure go down more

Resolved Question: A fixed amount of oxygen gas is held in a .500 L tank at a pressure of 3.33 atm. Chemistry HELP?!?

A fixed amount of oxygen gas is held in a .500 L tank at a pressure of 3.33 atm. The tank is connected to an empty 1.50 L tank by a tube with a valve. After this valve has been opened and the oxygen is allowed to flow freely between the two tanks at a constant temperature, what is the final pressure in the system? I thought I had to use Boyle's law (P1V1 = P2V2), but didn't get the question right.. am I using the wrong equation? more

Resolved Question: ever have twitches ?????????

Ok so for the past few weeks or so i have been getting twitches in my lower abdomen, in the same area as my fallopian tubes and uterus. it dose NOT hurt or cause any pain, and feels exactly like the twitches you get in on your eye occasionally or in your arms and legs some times (you know what i mean?) i didn't think anything of it the first time but it has happened a few times in the past few weeks or so. Also the other day i felt like i got a slightly bigger twitch (just one solid twitch) in the middle-right of my stomach about mid way between my belly button and pubic line... any suggestions would be incredibly helpful..also im not pregnant or atleast dont think i am. ive takin 3 test all neg... but i am late..had spotting on feb 12,14,and then had a light flow of brown blood from the 18th-24th im kinda confused... just doing the research..Thanks! more

Resolved Question: Tampon problem....help?

I just put in a Playtex Gentle Glide Regular Absorbency Tampon, and the size/flow is fine. The problem is that I can feel it like crazy! I have put tampons in millions of times before and it's always the same problem- i can feel it. This time, i even tried pushing it up farther with the applicator AND with my finger. my finger was in almost all the way and apparently its "still not in far enough". i don't know what else to do. it is kind of stinging and i feel awkward and i feel like it is leaking and it has only been in for 20 minutes. I tried standing up this time also instead of sitting down. when i am putting it in it kind of looks a little titled, but i think that's because i'm using my right hand and not both hands. What should i do?! I can't stand this anymore!!! I need to learn how to use tampons correctly! I put it in until my fingers touched my body and pused it in. when i push it in it hurts. like from the second i start pushing it. maybe i'm not pusing the tube fast enough? help me please:( this is a huge problem. more

Resolved Question: Fluid Mechanics Help?

Water flows through a tube which is connected through a reservoir. The tube is at first 100mm in diameter, becomes 50mm, then 100mm again at the throat. Cavitation occurs when the height of the tube is greater than 60 centimeters. Calculate the Vapor pressure of the water. I am completely lost on how to approach this problem.To add more information, the professor had left out that the barometric pressure is 1 atmosphere. Furthermore, he said that there is a numerical answer greater than 10 kPa. more

Voting Question: My 1996 S10 Blazer is burning up engine coolant any ideas whats causing this?

I have checked both the over flow tube and the tube running to my radiator, both are tight and not leaking. Other than that i have no idea i need some help please. more

Resolved Question: What comprises a "pressure vessel"?

The question is not as simple as it seems. In the US, ASME certification is required in order to sell something which is classified as a pressure vessel, and ASME certification is not necessarily all that easy or inexpensive to obtain (it can be, but not necessarily). Let's take an example: a boiler with ASME certification is connected to piping which has valves to control the flow of steam. Does the piping require ASME certification? That could probably be answered in a couple of ways ... if the piping meets a Schedule specification (e.g., schedule 40 or schedule 80) and the valve meets the same specification and it can be determined that the pressure from the boiler doesn't exceed the schedule specification then everything is probably OK, but what if something besides Schedule piping is used? Or what if the piping, tubing, or conduit is open at the end ... a steam nozzle is attached, for example? Basically I need a definition I can work to. I've looked through ASME sites and I've found a number of applicable specifications. The one that seems to be most pertinent, BPVC-VIII - 2007, costs $630. While the company I'm working for would probably buy it, I need justification even to get that far and justification to continue with design along the direction I'm currently following. Thanks for your help, Mark Stapleton www.h2omarkdesign.comMaybe there's no free lunch (no doubt), but I'd appreciate it if someone could expound on such things a bit, as opposed to just pointing me to sites that I have to pay to view. Even the links are appreciated, though. more

Resolved Question: Determin the diameter of the inlet and outlet pipe on a heat exchanger?

a heat exchanger has 30 cooper tubes of diameter 25 mm connected in parallel to an inlet and outlet pipe. OIl of relative density 0.85 flows through the exchanger with a velocity 3m/s in both pipes and tubes. determine the dia of the inlet and outlet pipes Volume-flow = 5m/s x A(0.025) x30x10^3 = 44.2L/s I Don't know how to find the pipe dia. Please show working out thanks more

Resolved Question: Physics Help with Fluids?

The horizontal pipe shown in the figure View Figure has a cross-sectional area of 40.0 cm^{2} at the wider portions and 10.0 cm^{2} at the constriction. Water is flowing in the pipe, and the discharge from the pipe is 6.00×10−3 m^{3}/s (6{L/s}). Find the flow speed at the wide portion. Find the flow speed at the wide portion. Find the pressure difference between these portions. Find the difference in height between the mercury columns in the U-shaped tube. more

Resolved Question: Why would water be flowing out of my discharge tube on my hot h20 heater? We heat with an outdoor wood boiler?

We have an outdoor wood boiler. We heat our hot water heater with this. We have not had any problems until now. Once the temp on the boiler outside hits 185 then the water starts to come out of the discharge tube on the hot water heater in our garage. I mean run out. Maybe so far today 3 gallons. Once the temp goes down alot cooler on the boiler maybe 110 then the water stops coming out of the tube. The hot water tank is only 3yrs. old. more

Resolved Question: Anyone familiar with ATV snorkels?

I'm wanting to snorkel my little Bayou 220, but the air box isn't in good enough shape. Since eliminating the air box and hooking the snorkel directly to the carb won't work, would a 2" to 4" connector from the carb, connected to about a foot of 4 inch tube hooked to that, and then another 4" to 2" reducer to hook to the snorkel work? It's basically replacing the airbox with 4" tubing with a reducer on each end for the carb and snorkel. If I figured out the volume of the factory air box, and cut the tubing to a matching volume, would it work? I figured if it gets too much air I could always add another filter to restrict air flow if I needed to. I made a picture to kind of show what I am trying to explain. Sorry about my artwork :) http://imgur.com/Ld9CX Thanks in advance! more

Resolved Question: Anyone know about ATV Snorkeling?

Resolved Question: convection???????????????

convection can make water flow round the pipes in a house,without using a pump. think about the glass tube full of water which we heated and then added potassium permanganate to. Explain what happens to the water above the heat to cause the convection current.? more

Resolved Question: dull throbbing lower pelvic?

today and yesturday ive been feeling a slight throbbing and shooting pain up my lower left side were my fallopain tube & ovary is!, is that normal? my periods in 6 days & i havent felt anything like that before unless i havent noticed it :\ unless its around ovulation, is it just premenstration? should it throb & make me flinch? :\ i dunno whats wrong my mum saying its normal since my periods are in acouple of days that the tubes are getting ready for menstral flow. ive been doctors 4 times now & he doesnt seem think anything wrong :\ he wont send me to gyno says i dont need one, my periods last up to 7 days & a 31 to 35 day cycle. could it be just me? is the dull throbbing tenderness normal 5 to 7 days before menstrating? more

Voting Question: lm stressed,scared,why is it like this i cant fall pregnant?

i had irregular mensturations,i went to doctors,was told ma fallopian tubes were blocked and they did laporoscopic surgery,and i was told doctors managed to unblocked the left tube and the right tube opened its self,,but after the surgery,i continued having heavy flow with big clots and it can last for three to four weeks,i then went back to doctors ,i was told I have low blood and i was told i will never be able to have kids,lm scared,every time i go to the hospital lm told my FBC is very low.i dont have kids but i want to have one,i have tried and i didnt fall pregnant.doctors told me i have to fall pregnant,but i dont know if this will correct ma irregular periods,please help me please!!!!!!!!!!!!!!!!!!!!! more

Voting Question: Disqualified from BUD/s?

I have a few medical questions about Navy Seal BUD/s training. I was disqualified at Meps during my airborne physical because I could not "pop" my ears. Apparently my Eustachian tube or one of the tubes in my ear is blocked for whatever reason resulting in no air flow. Therefore my eardrums don't rotate which means my ears will not be able to equalize pressure when I dive or jump out of a plane. I was reading online for ways to pop your ears and none of them worked but I did realize that you can have an operation where a Doctor cuts into the tubes in your ears to allow airflow therefore fixing the problem. When I was reading further about other BUD/s dis qualifiers I read that some students are dropped for not understanding diving physics and things such as that and one student was actually dropped because he couldn't breathe out of his mouth while wearing a water filled mask. I am just hoping to get some information on all of the things that can disqualify you from being a Seal weather it be before enlisting or while you are in the training. Thanks for your time more

Resolved Question: Why has Water stopped running to the dispensers in side by side refridgerator/freezer?

This is a frigidaire appliance we got in 2003. Everything was working fine until two days ago when someone neglected to check the ice chute; it was stuck open all night from a cube. The next day almost everything in the fridge was frozen. The freezer was over frozen. That night, the tube going to the icemaker was frozen inside, so water was gushing in places it wasn't supposed to and freezing over causing further problems. I turned the icemaker off, cut off the water supply, allowed the freezer to defrost, checked for ice in the fan and condensers. Everything seemed to be working fine afterwards, but now, the water will not run to the front dispenser, nor to the icemaker. The filter is OK. Water comes out of the filter housing. I can hear the solenoid when I activate the dispenser and when the icemaker is trying to get water, but there is none. The water was flowing fine before this incident. Other than replace that solenoid, what can I do? Thanks in advance! more

Resolved Question: Tampon always leaks, going on vacation next month?

I'm 16 and I can never use a tampon without it leaking! I use Tampax slender regular and I always have to wear a pad with it anyways, though when I take it out it's not even fully soaked or expanded, it's still tube-shaped! A few days ago, my flow was particularly heavy and I used both a tampon and a pad, and 4 hours later, my entire pad was soaked through! Normally I don't have to use tampons too much and just stick to pads, but I'm going on vacation in a month and I might be on my period then, but I would probably be in a bathing suit the whole day, and I can't wear a pad with that so tampons would be my only option! What are the best brands for leak protection? And am I putting it in wrong? How am I supposed to put it in to prevent leaks? Thank you so much!I thought I was putting it in right since I don't feel it once it's in... How am I supposed to put it in to ensure no leaks? more

Resolved Question: will different header brands fit different exhaust brands?

i have a 2004 3.9 liter v6 mustang. i bought this car a few weeks ago. and apparently, it had a flow-master system. my question is that i want to get some long tube headers and i am wondering if a brand like bbk will fit on my flow-master system. i just want to get that low and mean sound! thanks more

Voting Question: Why is the rather how is the mass flow rate constant for a fluid flowing through a tube?? Please explain a bit?

Resolved Question: How to use a compression fitting question, what is this little insert that came with the fitting?

Inside the nut there is a sleeve(that fits over the pipe/tube) but there also is a little insert that is smaller the 3/8 size of my tube that came with the compression fitting. Here is a picture of what the little insert looks like i found on google(It fits between the compression fitting and the nut sticking of out the end that the pipe would go into. This would restrict the flow at point of the connection. Is it needed? I will be using this fitting on a transmission hard line, but i though the question should be placed in the section http://ecx.images-amazon.com/images/I/21Er-hEYfkL._AA280_.jpg more

Voting Question: Engineers, flow rate due to hydrostatic pressure, applied to a burette.?

Simplified, it is a vertical tube with flow restriction at the bottom, assume laminar flow. Equivalent to a burette. The pressure causing the flow is hydrostatic, density*g*height. So I want to know how the fluid flow rate varies with time. Is there some existing engineering formula for that, or easy to derive? Thanks. I am retired - this ain't a school assignment.So redbeard, Q = Kexp(-kt) lnQ = lnK - kt ?? more

Resolved Question: 300 liter per hour filter in a 70 liter tank for a betta?

i'm really worried!! this was the most low flow rate filter the fish store had (they gave us 800L/hour and it was monstrous). its has a rather weak flow, but my betta still doesnt seem to be able to stay at the same place without being carried away with the current from time to time. i watched her fins and she's moving them really fast, more than usual- so she's really working her butt off to try and swim. she can swim, its not like she cant, she can run away- but for some reason she prefers to stay close to the filter and catching the bubbles coming out of the air pump which is next to it. i dont know if she's suffering or having fun* but wither way i dont know what to do. i tried having the filter face the front, then the side- but it was almost the same. can i isolate it so it wont bother her? what can i do to make sure she wont be bothered by it? i can improvise if needed (like blocking the hole and having the water coming out from the tube only- anything!) - just tell me what to do! for now i just have it working every other day for an hour or two, Victoria is the only fish in the tank so i figured it would be ok if i dont have the air pump and filter working all the time.my betta is a female, she wouldnt start a bubble nest :)lol i mean that i wouldnt get a male for her. i used to have her with one and they got a bit agressive, so i rather have her with other fish when the time comes for me to have time to go and buy fish! :) more

Resolved Question: What is this engine part?

I have a 1993 F150 V6 4.9L and dont know what this part is. Its connected to the fuel injector and also the accelerator cable. it has to valves that open and close and they have round tubes flowing to the air filter. Here is the link. http://www.f150forum.com/attachments/f13/4387d1238467462t-fuel-injected-4-9-engine-swap-into-1977-f150-ford-engine-swap-028.jpg - - - - - In the picture, its directly to the right of the fuel injector and has 2 round valves. What is this? i took it off and cleaned it because it was severely gunked up with residue. Please help.This is not my engine, just the only one i could find on here to show that part. Thanks everyone for the help. more

Voting Question: Engine oil (N,eta=0.20 Pa* s) passes through a 3.80 mm diameter tube in a prototype engine. The tube?

What pressure difference is needed to maintain a flow rate of 3.0 mL/min? P= Pa more

Resolved Question: Question about Mercury Villager heating system?

Does this van have a thermostat somewhere that controls the temp inside to the heater core, or the flow of coolant? I bled the darn thing, and the bleeder hose gets very hot when bleeding, and has a good flow. At times I have a large amount of heat in the van after running it a while. I have hardly any bubbles coming out from the tube at all, and it is topped off in the radiator. I bypassed the rear heater removing the T's because the back didn't function anymore, and leaked at the lines under the van. The heater hoses both get fairly hot to the touch at times going to the core. more

Voting Question: Toilet Bowl will not cooperate ? What am I missing here ?

What do you need to do to get more water to flow into the bowl after flushing. It only gets about 2 cups of water ? It functions fine otherwise. It fills to the fill line on the fill tube. Flapper works fine and toilet flushes fine. Mystery to me is why so little water flows into the bowl. more

Voting Question: Chemistry Help Please! If you Can help with either problem that would be great! Im stumpped!?

A fixed amount of oxygen gas is held in a 1.50 L tank at a pressure of 2.40 atm. The tank is connected to an empty 1.00 L tank by a tube with a valve. After this valve has been opened and the oxygen is allowed to flow freely between the two tanks at a constant temperature, what is the final pressure in the system? and Hot-air balloons rise because the hot air inside the balloon is less dense than the cooler air outside. Calculate the volume an air sample will occupy inside a balloon at 43.0°C if it occupies 2.68 L at the outside air temperature of 22.0°C, assuming the pressure is the same at both locations. more

Resolved Question: carrier humdifers drip problems?

i have a carrier Humidifier(model 49sw series) attached to my furnace and unfortunately the past owners did not attend to the unit. i have replaced the filter pad,drain tube, etc. Now i have eliminated the problem all down to one. i turn on the water flow and the pan fills up but it never stops. i have adjusted the float arm and it still doesn't shut off and the drain tube starts to relieve the excess. Is this normal just to have the water constantly overflowing? Do I need to replace the water feed adn float? thx for your help more

Resolved Question: Fluid Mechanics Help- Venturi Meter?

Hi peeps a little help on this question, i'm drawing blanks A venturi meter is tested with its axis horizontal and the flow measured by means of a tank. The pipe diameter is 76mm, the throat diameter is 38mm and the pressure difference is measured by a u-tube containing mercury, the connections being full of water. If the difference in levels in the U-tube remains steady at 266mm of mercury while 2200kg of water are collected in 4min, what is the coefficient of discharge? (sp of mercury is 13.6) any help would be greatly appreciated more

Resolved Question: Where can I get a decent enema kit?

I bought a cheap one on Ebay and tried using it this afternoon with disastrous results. First the suction clip kept sliding down the bathroom tiles. No problem I thought, the house is empty, i will put the back on the back of the open bathroom door, right next to the bath. Finally got the nozzle inserted, after considerable pain!, probably because they only give you 4 feet of tubing and discovered that the nozzle was blocked. Inded the valve is so close to the nozzle that the valve is virtually in there as well, that can`t be right. So I stands up to remove nozzle and bag falls of bathroom door, result 2 litres of water on the floor. So unblocks the nozzle, cleans it and off we go again but still am not getting any feeling of anything happening. What little water that is coming out is just dribbling down between my legs, so stand s up again to check that this thing really works and bang, 2 litres of water is back on the bathroom floor. Obviously I need something a big better, I reckon 8 feet at least of tubing, something that can be safley placed at a higher height to increase down flow and a better nozzle. There is nothing cleansed about me as I currently have several wet towels in the wash, I fell quite frustrated after that little epsisode so if anyone can help, please do. more

Resolved Question: Question about an electron placed in an electric field applied accross an air gap...?

Suppose we put an electron in a tube filled with air,and we apply an electric field accross the tube...I read that the electron will flow accross the tube,constituting a current. Now,air is supposed to be an insulator in the sense that simply applying a potential accross an air gap will not allow current,as there are no free electrons.....,but it will NOT obstruct the flow of free electrons that are placed there. Somehow,this concept is not clear to me...I just can't imagine a free electron moving in an air gap with a potential applied accross it...it seems that the air should,in some way,like due to mechanical air resistance,stop the electrons from flowing. Could anyone explain why indeed the electron moves in the air gap under these conditions?does that mean that there is a lower limit of applied potential,only above which the electron can flow in air? Also,does the electron experience more resistence in air than in any conductor since there are no other electrons,which could help the electron to conduct a current through the air gap? (in other words,why is the resistance of air greater?) more

Resolved Question: Back pain getting really bad what do I do?

I started what I though was my way late period on 2-2. Before any bleeding started I had this horrible back pain and now it's back even worse than yesterday! My period usually starts with spotting and a full flow by the second day. But it has been really light and brownish red looking. I also keep having this nagging pain in my uterus? What could be going on? I want to go to the ER but don't want to waste money on something that's probably nothing. Any advice ladies? I also had a ectopic with tube removal 1-2007. I have my right tube left. My lmp was 12-27 I was due to start 1-24 but started 2-2. more

Voting Question: help with lab been out of school don't know what i have to do.?

If a codon is mutated, say from GGU to CGU, is the same amino acid specified?_______ Questions: 1. Select one of the observations (either clue 8 or 9) from the table: Possible Clues to Copying the Code (DNA replication and transcription/translation). This evidence was used to understand DNA replication (DNA passing information from one generation to the next). Write an explanation detailing why this clue represents solid data and is not an opinion or an inference. Questions: 1. Select one of the observations (either clue 8 or 9) from the table: Possible Clues to Copying the Code (DNA replication and transcription/translation). This evidence was used to understand DNA replication (DNA passing information from one generation to the next). Write an explanation detailing why this clue represents solid data and is not an opinion or an inference. 2. (a) Why is it sometimes difficult to tell the difference between an observation and an inference? (b) Which of the clues included in the table is an inference? Explain why. (c) Which of the clues included in the table is an opinion? Explain why. 3. Francis Crick was the first to recognize that information flows from DNA to RNA to protein. This concept is known as the Central Dogma. At the time the Central Dogma was first stated, it was an inference based on observations. Explain why. 4. Scientists bring preconceived ideas to their work. Often these preconceptions make it difficult for them to objectively interpret their data. From the information provided in the Copying the Code module, state one example of a preconceived idea that biased scientific thinking and slowed finding the answer to how DNA is a copying mechanism for hereditary material. Table: Possible clues to Copying the Code (DNA replication and transcription/translation). Clues Evidence supporting replication Evidence supporting transcription /translation Not evidence for replication or transcription /translation 1. When DNA from a virus is injected into a bacterium, the bacterium produces viral (phage) protein. 2. Protein synthesis occurs in the cytoplasm of cells. 3. When a gene is destroyed through exposure to radiation, its capacity to produce an enzyme stops. 4. Bacteria grow for many hours in a heavy nitrogen medium. 5. If you understand the structure of RNA then you will know how proteins are made. 6. RNA is a nucleic acid found in both the nucleus and the cytoplasm. 7. Uracil hydrogen bonds with adenine in place of thymine during RNA synthesis. 8. Bacteria with heavy nitrogen in their DNA, when transferred to a culture tube with lighter nitrogen, formed DNA molecules that were made of half heavy and half light nitrogen. 9. When DNA is removed from a cell and placed in a test tube containing the enzyme DNA polymerase and nucleotides, new copies of the original DNA are formed. 10. Since there is greater variety in the protein molecules than in the DNA molecules of an organism, protein must contain the genetic code. Examine the section of the DNA website entitled “Reading the code” before working on the following questions. 5. What question about reading DNA code did Marshall Nirenberg answer using the cell-free system developed by Zamecnik and Hoagland? 6. What question does Sydney Brenner ask in “Defining the gene?” Explain why this was an important question to understand how DNA codes for protein. How does the sequence of bases correspond to the sequence of amino acids? 7. George Gamow thought that three bases in DNA corresponded to one amino acid. To confirm this idea, Marshall Nirenberg used a synthetic RNA containing only one kind of base. What question was his experiment attempting to answer? 8. Briefly describe Seymour Benzer’s experiment that answered the question: “Do mutations in the DNA sequence of a gene correlate with protein changes?” 9. Marshall Nirenberg and Heinrich Matthaei used mRNA made up of repeating uracil nucleotides in a cell free extract. They obtained amino acid chains consisting of phenylalanine. What did they learn when they asked the question, ”What happens when mRNA made up of only cytosine, alanine, and guanine are placed in a cell free extract?” 10. Explain how the structure of tRNA helps it to deliver the correct amino acid to the corresponding mRNA codon at the ribosome. Sketch the structure of a tRNA molecule, making sure to label the amino acid and the anti-codon. 11. List or draw sequentially the steps involved in protein synthesis. Start with the DNA code in the nucleus, and try to end up with a polypeptide in 10 steps. Title your work “10 easy steps to synthesizing your protein.” 12. Explain why a mutation that occurs in a codon may not result in a change of an amino acid in the protein sequence. Use the genetic code chart to give an example of how this might occur. (Th more

Resolved Question: Selecting a water pump to flow water to demonstrate blood flow in arteries.?

To build a laboratory demonstration set up to show the blood circulation system, will it be ok to use a water pump that will flow water at a continuous rate through the tubes? Or the flow needs to be pulsating? more

Resolved Question: How does transferring water from a higher elevation to a lower elevation deal with air pressure?

In the experiment, one beaker was fill with water and placed on a stack of book while the other beaker was on the table. We had to transfer the water from the higher beaker to the lower one. We had to coil the tube in the higher beaker with the water and then put a thumb on one end and slowly take that end to the othe rbeaker. a flow of water will start but how does that relate to air pressure for chem. more

Welcome to Flow Tube News

PREVIEW-Devices to take center stage at ACC heart ... - Reuters

NEW YORK/CHICAGO, March 11 (Reuters) - Abbott Laboratories and Medtronic Inc will grab a share of the spotlight at this year's American College of Cardiology scientific meeting, as devices and procedures aimed at avoiding traumatic surgeries muscle ...

Largest physics meeting of the year convenes - Genetic Engineering News

WASHINGTON, D.C., March 8, 2010 -- The March Meeting of the American Physical Society (APS) -- the largest physics meeting of the year -- will take place from March 15-19, 2010 in Portland, Oregon at the Oregon Convention Center and the Hilton ...

Boston Scientific Gets FDA Approval For Express LD ... - RTT News

(RTTNews) - Medical devices manufacturer Boston Scientific Corp. (BSX: News ) said Thursday that the U.S. Food and Drug Administration has approved its Express LD Iliac Premounted Stent System for use in treating iliac artery disease. The company ...

Too Many Heart Tests Done, Some Say - WSB-TV Atlanta

NEW YORK -- A troublingly high number of U.S. patients who are given angiograms to check for heart disease turn out not to have a significant problem, according to the latest study to suggest Americans get an excess of medical tests. The researchers ...

NBA Capsules: Mavericks beat Nets for 13th straight ... - Brownsville Herald

DALLAS — Top scorer Dirk Nowitzki was struggling, and the Dallas Mavericks needed points from other sources. Jason Kidd, Caron Butler, rookie Roddy Beaubois and Shawn Marion picked up the slack. Kidd had 20 points and nine assists, hitting 5 of 8 ...

Beach Houses NJ – A Great Value LBI Bayfront shore ... - PRLog (free press release)

PR Log (Press Release) – Mar 11, 2010 – Barnegat Light, NJ, March 12, 2010 – Realtor Laura Pridel of Prudential Zack Shore Properties will be your host for a tour of this 4-bedroom family home and retreat located on the naturally-flowing High ...

Study: Too Many Invasive Heart Tests Given - CBS News

(AP) A troublingly high number of U.S. patients who are given angiograms to check for heart disease turn out not to have a significant problem, according to the latest study to suggest Americans get an excess of medical tests. The researchers said ...

First Digital and Dynamic Pressure Sensors - PRLog (free press release)

... sealing, while the SDP610 is designed for a tube connection. SDP600 series is designed for high-quality mass production, which makes it a perfect fit for demanding OEM applications. Depending on your specific requirements you can choose between ...

Risky heart test too common - Berkshire Eagle

Dye is injected through the tube to make blockages show up on X-rays. Angiograms are often given to patients who might be having a heart attack ... For now, experts suggest patients in the category studied by the researchers question their doctors ...

Study: Invasive heart tests too common - The Daily Advertiser

NEW YORK — A troublingly high number of U.S. patients who are given angiograms to check for heart disease turn out not to have a significant problem, according to the latest study to suggest Americans get an excess of medical tests. The researchers ...

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