1. A hose is hooked up to a faucet & the water is turned on.Water leaves the end of the hose under a specific amount of pressure\na. what happens to the hose if you put thumb over the opening?\nb. what is happening to the pressure in the hose?\n\n2. hoses are built to withstand a certain amt of pressure\na. what whould happen to the hose if the pressure were always near its maximum pressure?\nb. how is related to what happens in a vessel in someone with atherosclerosis?\n\nPLEASE INCLUDE WORK CITED!!! THIS IS REALLY IMPORTANT..
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I won't do your homework for you. But I will tell you this:\n\n\n1a&b. These should be common sense. Go outside and turn on the garden hose and tell your teacher what you've observed.\n2a. Look up BERNOULLI'S LAW as it pertains to fluid pressure through a tube. There is a formula that related pressure to hose diameter and volume.\nb. The answer is: high pressure is bad for vessels weakened by atherosclerosis.
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Air pressure is with the quantity of air molecules in a given area.  Water pressure is the density of the water pushing down on you. And in outer space you aren't crushed because of pressure, the pressure your body exerts outward is greater than what is being pushed inward, so you explode.
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Blood flow in the area. Like watering flowers, don't water and they die.
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Because although the temperature is very low, the pressure is essentially zero (<< 1Pa). Nothing to do with gravity.\n\nReducing pressure reduces the boiling point.\nHowever below T=273K ,P=10^3 Pa, water goes cannot exist as liquid, it goes directly from ice to vapor.\nThis is what the phase diagram of water describes (see graph):\nhttp://en.wikipedia.org/wiki/Phase_diagram\n\nSo the water will evaporate and then sublime to ice almost immediately as its temperature goes below 200K.\nThe ice is going to be in form of microscopic dust because the vapor molecules dispersed due to the zero pressure.\n\nThis diagram is actually clickable, so you can click on the phases and phase lines to see their curve-fit and coefficients.\nIn this case, go to bottom left (low P, low T) you can see the ice-vapor line from (P=0,T=200K) to (P=10^3Pa,T=273K)..\nhttp://www.lsbu.ac.uk/water/phase.html
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Go to this page and look at the second picture.\nhttp://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/Pascals_principle.html\n\nThe water in both tubes is the same amount. When the little box goes down, it forces up the big box. \n(Go here for a demonstration.) http://webphysics.davidson.edu/physlet_resources/bu_semester1/c23_pressure_pascal.html\n\nNow look at the letters on the picture. (W, A, D, F). Note which ones are ones and twos. (F1, F2, etc.) Now look at the formulas below. Don't be scared! Just compare the letters in the picture to the letters in the formula. Do you see which ones are equal? Think about what the letters mean in the formulas.\n\nNow, after you know how to describe the picture, try to read everything on the page.\nOnce you've done that, try the exercises below.\n\nYou have just looked at the hydraulic pump.\nFor another example, go here: http://www3.fhs.usyd.edu.au/bio/fluids/pascal/pp1.html\n\nThe reason why this all works is because the pressure is the same in all directions. (See here for a cool picture) http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Pressure/HydroStatic.html\n\nHope this helps. Just look at the pictures, it helped me. Good luck on your quiz!
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For the same reason that water goes down the plug hole in a vortex.  Air goes from high pressure to low pressure, but it goes round areas of low pressure in ever decreasing circles.
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&#92;\n..&#92;\n..-----&#92;\n........&#92;\n.........&#92;\n(ignore the periods)\nx axis: time\nY axis: temperature\nThe step is there because the nature of cooling objects. As the naphthalene is cooled, its temp first decreases normally. However, when it begins to solidify, the heat being removed is used up as naphthalene molecules are subjected to intermolecular forces and begin to become a solid. Therefore, the horzontal part is where the substance becomes a solid. Finally, when the naphthalene is fully a solid, the temperature decreases again. An easy way to picture this concept is with boiling water. As some water molecules change to the gaseous state, the temperature of the water does not rise above its boiling point. This is equivilent to the horzontal part of the naphthalene cooling curve. As the substance changes states, energy is being generated/used up, and the temperature does not change for a time. When the conversiion is fully made, the temperature continus on its original course.
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In non viscous fluid mechanics, there are essetially two principle in play : 1. the Principle of Continuity 2. The Bernoulli's Principle\n\n The former states that the rate of flow of liquid is same throughout the length of a pipe etc. i.e A1 * V1 = A2 * V2 ( where A and V are the Area of Cross section and Velocity of liquid at different stages)\nThus, when u squeeze the hose the A decreases and to maintain the equation the V has to increase.\n\nThe Bernoulli's Principle relates the Energies of two different stages :\n P1 + 1/2 p*V1*V1 + p*g*H1 = P2 + 1/2 p*V2*V2 + p*g*H2\n\nWhere P,p,H are the Pressure, density and Height.\n\nSURPRISINGLY, using the above eqn, we find that when we squeeze the hose, the PRESSURE actually decreases rather than what we think logically.
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i=v/r\n\ni=current\nv=voltage\nr=resistance\n\nThink of it as a hose full of water. The current is the amount of water going through the hose. The voltage would be the pressure of the water, and the resistance would be the diameter and the length of the hose. So obviously if you have a huge pressure on a huge diameter hose, you are going to have a huge current. But if your resistance is very high, like say the hose is just a little straw, then even with alot of pressure the current will be pretty small. And same thing the other way around. If you have a really big pipe, then you only need a little pressure to move alot of water.\n\nElecricity works the same way, except that resistance is not so much the wire as is the appliance in the circuit. So you might say that a light bulb has a certain resistance that causes a certain current when hooked up to a 12 volt power source.
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Actually, the sprinkler rotates in the same direction as before.\n\nThe motion of the water as it gets into the sprinkler exerts a force on the inner walls of the tubing that has a similar direction as in the first case. Considering the previous posted answer, the thing to consider here is the friction. In a frictionless system, it may not move at all, but since our world is not frictionless, the contact of water with the walls implies some momentum exchange.\n\nIt's hard to explain without images, but try the following. Having the sprinkler out of the water, try blowing some air inside one of the openings with your mouth or a syringe. Obviously the whole tubing will start spinning away from the direction of the blowing air. Well, the same happens with the sucked water, but instead of it being "pushed" inside, it's "pulled" inside. The process may be different in cause, but the effect is the same.
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Water pressure is the pressure that water exerts on any object that is immersed in it. Picture holding an object over your head the object is exerting a force on you. In the same way water exerts a force on you if you in a pool, but a force on all parts of your body. Atmospheric pressure is similar to water pressure but it is force exerted by the air around us.
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I've written quite a few articles criticizing the procedure and have written several Yahoo Answers on this topic.  My position is that there's absolutely nothing "natural" about inserting a hose into your rectum and filling yourself with water.\n\nRisk factors include infection, electrolyte imbalance, perforation of the colon and a handful of others.  Death is uncommon but has happened. (Most deaths are due to perforated colon walls.)\n\nA 2004 study in Britain found that the majority of practitioners had NO medical background at all yet, more often than not, they're performing this procedure totally alone with no one there to help if something goes wrong.  A suit filed by the Texas Attorney General found a similar situation in that state.\n\nPlus, even though I've devoted my entire career to natural health, I just don't agree with the ideas that a.) we're all walking around with all this excess fecal matter stuck to our insides or b.) that colonic irrigation has any benefit other than to clean the colon in preparation for a medical procedure.\n\nBest Wishes.
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If its during the construction phase of a project or during a remodel, it is also very easy to fix.  Usually, plumbing to a toilt or sink come up from the crawl space, floor slab, or basement.  insteading placing an elbow and turning out the wall, you place an in-line "tee".  The branch of the tee goes out the wall to the stop cock and then on to the toilet or sink.  on the top of the tee still in the wall, place 6 or 8 inches of pipe and cap off the top of it.  this too will cause an air pocket to dampen the effects of sudden changes in flow.
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first off, it's Homeostasis.\n\nThe other guy is right, a cell is never at perfect equilibrium, however, on the two extreme ends, a cell could Lise (explode) with too much water(hypertonic to it's environment, so water enters the cell), or sort of shrivel up with not enough water (hypotonic to it's environment, so water leaves the cell)
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Does cutting flower stems under water really help prolong the life of the flowers in the vase?\n\nThey say that if you cut the stems in air, air bubbles get in the stem and prevent water from traveling up to the leaves and flowers, so the flower wilts sooner.
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1. all hail the sun.\n\n3. air molecules in the atmosphere are still in continuous motion and are bombarding surfaces. thus atmospheric pressure.\n\n4. assuming that the density of the water is 1 g/cm^3. 3 liters of water = 3000cm^3. mass = 3000g. = 3kg.\n\n5. pressure is force per unit area.\n\n6. approx. 103.6 cubic centimeters\n\nbut do correct me if im wrong.
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Think of the analogy between the flow of electricity and water where voltage is pressure and current is water flow.  It take voltage (pressure) to cause current (water flow).  Therefore, current (water flow) will occur in the direction under greatest voltage differential (pressure).  Because you may be working with more than one voltage source (two transformers or ttwo battery cells?) one of the sources may be adversely affected.  Are you working with AC or DC?  You may need to avoid connecting a circuit for example that would be like charging a car battery with the leads reversed.  Good luck.