how does fluid help everyday life,how does it help planes fly,how does it help race cars?
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It helps planes fly because they have complicated hydraulics systems.  These systems do different things such as raise and lower the landing gear, open and close doors, move ailerons, elevators, the rudder, as well as flaps and other systems.  \n\nAnother thing, fluid is not only a liquid, gases are also considered to be fluids.  If there was no air, then planes couldn't fly because they would not be able to create lift.\n\nIn everyday life, you use hydraulics systems and may not even know it.  The brakes system as well as the power steering system on your car are both hydraulics systems.  Other fluids in your car include the water and oil, which both cool the engine and the oil does the essential lubricating of the engine.  \n\nRace cars?  Well, they have a brake system, which is hydraulically operated just like your car's.  Some of them have power steering, but not all of them do.  If they are circle track cars then they probably do, but most drag cars do not have power steering, as the power steering takes power from the engine.  All car engines have an oil lubrication system.  Circle track cars certainly have a water cooling system, although most drag cars don't.  They just fill the car up with water, but it doesn't have a water pump in it to circulate the water.\n\nHope this helps.
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Balance Your Body Chemistry.\n\nIf you've ever taken chemistry in high school you're familiar with this simple experiment to test the conductivity of salt. Two ends of an electrical wire are attached to a light bulb. The other ends are submerged in a glass of water. Because water alone is not conductive, the bulb does not light up. But when we add a little salt to the water the bulb starts to glow.\n\nIt's the same with our body. When we lack the natural elements in salt we suffer from a chronic energy deficit, or deficit of information. Salt is a core essential nutrient with exceptional abilities and qualities fundamental for keeping us alive.\n\nScience and medicine have tried to define the precise roles of salt in the healthy and diseased human organism. Blood, sweat, and tears all contain salt, and both the skin and the eyes are protected from infectious germs by the anti-bacterial effect of salt. When salt is added to a liquid, particles with opposite charges are formed: a positively charged sodium ion and a negatively charged chloride ion. This is the basis of osmosis which regulates fluid pressure within living cells and protects the body against excessive water loss (as in diarrhoea or on heavy sweating).  Sodium and chloride ions, as well as potassium ions, create a measurable difference in potential across cell membranes. This ensures that the fluid inside living cells remains separate from that outside. Thus, although the human body consists mainly of water, our "inner ocean" does not flow away or evaporate. Sodium ions create a high pressure of liquid in the kidneys and thus regulate their metabolic function. Water is extracted through the renal drainage system. The body thus loses a minimal amount of essential water. Out of 1500 litres of blood which pass daily through the kidneys, only about 1.5 litres of liquid leave the body as urine. \n\nSalt is "fuel" for nerves. Streams of positively and negatively charged ions send impulses to nerve fibres. A muscle cell will only contract if an impulse reaches it. Nerve impulses are partly propelled by co-ordinated changes in charged particles.
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As the car moves along, air passes over the top of the roof, creating an area of low pressure.  The air pressure inside the car, having a higher pressure than outside, then forces the canvas upward.\n\nThe principle is similar to that of an airplane wing.  Of course though, there isn't anywhere enough lift generated to make the car fly.
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Here is the "How Stuff Works" website devoted to cars. It has pictures of many of the mechanical systems of automobiles. Very informative.
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Properties of Gases \n\n1.  Indefinite shape -- you can squash an air-filled  balloon to make circus animals\n2.  May expand -- balloons get bigger when temperature gets warmer\n3.  May compress -- can put lots of air into a car tire\n4.  Have low densities -- balloons filled with air will float on water\n5.  Diffuse uniformly -- put a pizza on the front seat of the car and the people in the back seat get hungry pretty quickly -- that pizza vapors travel to fill the car! \n\n11.2  Atmospheric Pressure \n\nEven though we can't see the air around us, we know it's there and those molecules bouncing around exert a force on our bodies.  Fortunately, the force is the same on all sides of us, so it equalizes out and we don't notice that we're pushing against the air as we move our bodies. \n\nWe use a barometer to measure pressure.  We can use lots of different units depending on the system we're using.  Normal atmospheric pressure at sea level is defined as "1 atmosphere of pressure";  we call this by the special name "standard pressure".  The equivalent measures in other  units for standard pressure are given in table 11.1;  when we talk about standard pressure in this course we will use units of atmospheres, mm Hg and torr.  You're probably familiar with the weatherperson talking about pressure in inches of Hg.  If you use 2.54 cm = 1 inch, you can do the conversion from inches of Hg to cm and then on to mm of Hg.  There's no magic here, it's just a metric/English conversion example. \n\nYou may be curious about how a barometer works.  Here's my interpretation.... \n\nLet's start with the diagram on page 295 which is a representation for the workings of a barometer. It helps to talk about how this setup is put together. One would hold the tube "right side up", that is, like a test tube and fill it "to the brim" with mercury. One then inverts the tube in a pool of mercury (taking appropriate safety precautions). Immediately some of the mercury will flow out of the tube. How much flows out depends on how much pressure the atmosphere exerts on the pool of mercury. If the atmospheric pressure is higher, there is more pressure on the pool of mercury and the material in the tube stays at a higher level. If the atmospheric pressure is lower on a given day, more mercury is allowed to flow out of the tube. If the atmospheric pressure increases again, more mercury is pushed pack up into the tube. It is important to recognize that a virtual vacuum (except for a few stray mercury molecules) exists above the liquid in the tube which exerts no pressure (has no influence) on the height of the material in the tube. The only influence on the height of the material, is the air pressure on the puddle of mercury at the bottom.\n\nThe number the weatherperson gives is the height of the column measured in inches or mm (of mercury). We use mercury because it is so dense. If we were to use a water column instead (mercury is 13+ times as dense as water), the column would have to be 13+ times as high.  \n\n  Do example exercise  11.1 and the self test.  You can make up unit factors using any pair of these units to do homework exercises 5 and 7. \n\n11.3  Variables affecting Gas Pressure \n\nThink of gas pressure as the effect of molecules hitting the walls of a container.  When the molecules hit harder, the pressure is increased.  The tire pressure in your car can be affected by 3 things:\n \n  \n\nVariable What we measure Predicted effect on pressure of the gas Why? Also true (follows logically); complete with increase or decrease \nvolume of the container how much air the tire can contain increase volume, decrease pressure more space for the molecules to move around, so don't hit walls of container so hard decrease pressure, (       ) volume \ntemperature of the gas temperature of the air in the tire increase temperature, increase pressure molecules moving faster, so hit
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Question -   Please explain how molecules in the air cause air\nresistance. Why air resistance is larger when a car a travelling faster?\n---------------------\nSharazaad,\n\nEven though you cannot see them, air molecules (a mixture of gases, mainly nitrogen and oxygen) are \njust like all other molecules inasmuch as they have mass and occupy space. Anything moving through \nair must push the molecules out of the way.\n\nThe faster the object moves, the faster the air molecules are encountered and the greater are the \nnumber to be pushed aside. This requires a larger force that necessary when the object is moving \nslowly. Consider swimming: The faster you swim, the harder it is to push the water molecules out \nof the way.\n\nStreamlining a car is a way of making it slip through the air more easily. Cars with narrow or \nwedge-shaped front ends and smooth, gentle curves allow it to slip through the air more easily \nthan bulky things like large trucks with large, boxy, flat front ends. Even something so simple \nas keeping a car clean and polished will help it slip through the air more easily.\n\nRegards,\nProfHoff 869\n=====================================================\nSharazaad,\n\n\nMolecules in the air have mass.  Even though they are invisible, they are\nstill there, and they still have to be pushed out of the way for a car to\noccupy the space that the air is in.  This now should make sense WHY air\nresistance even exists.\n\nNOW.  Why do greater speeds cause there to be an even greater air\nresistance.  It is true that there is barely any appreciable air resistance\nto a car going 10 MPH versus 60 MPH.  But at 60 MPH, even though there is\nthe same amount of air, the resistance is much greater because the car needs\nto move the air out of the way MUCH MUCH QUICKER.  I do not know if you can\nreally speak about viscosity of air (non - liquid).  But air really does\nbehave like a liquid when it comes to resistance.  HOW?  The air that is\nexisting on or above the sidewalk WILL ALSO RESIST the air molecule that is\nbeing struck by your car and pushed to the side.  SO, this is why at higher\nspeeds you will have a much greater resistance because you are FORCING THE\nAIR to move not at 10 MPH but NEEDING IT to move out of the way at 60 MPH.\n\nYou could say that the relationship between air resistance (r) and velocity\n(v) is proportional.  However, I think I read somewhere that resistance (r)\nis ~ velocity (v)^1.5\n\nPlease do not quote me on that ... but I am pretty certain I read it in an\nMath book for Engineers.  So there may be some credence to it.\n\nHope this helps.\nDarin Wagner\n=====================================================\nAir resistance is caused by the car banging into air molecules and\nincreasing their momentum in the direction the car is going.  Since the car\nexerts a forward directed force on the molecule, by Newton's 2nd law (for\nevery action there is an equal and opposite reaction) the molecule exerts a\nforce on the car in the backward direction, tending to slow the car.\n\n\nOf course, a molecule has so little mass, it exerts an extremely tiny force\non the car.  However, there are so many molecules that the cumulative effect\ncan be large.  You might also imagine what would happen if molecules were as\nlarge as bowling balls!  I think you can picture how the forces could be\nvery large.\n\n\nIncidentally, the molecules are moving at speeds much faster than the car is\ngoing and in random directions.  So some hit the car from the rear and speed\nit up a little (very little).  However, one coming from the front slows the\ncar down by a larger amount because the car's speed is added to the\nmolecule's speed for a molecule coming from the front and subtracted from\nthe molecule's speed for one coming from the rear.\n\n\nBest, Dick Plano, Professor of Physics emeritus, Rutgers University\n=====================================================\nHi Sharazaad,\n\nGood question,
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Lift. The shape of airplane wings (curved on top, flat on bottom) allows air to pass over them at different speeds, creating a pressure gradient. Higher pressure is built up underneath the wing, allowing for lift to carry it off the ground. For this to work, the airplane must maintain a minimum rotation speed to get off the ground (in a Cessna 150, that speed is about 90mph). Once in the air, the plane can reduce its speed and often glide, however when an aircraft looses too much speed, it looses lift and stalls out.
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Ask a scientist and they will say it effects every aspect of your daily activities. You and your surroundings are made of atoms that are mostly empty space. It is swarms of electrons with super tiny yet massive nuclei interspersed. All these forces acting on mass. Strong nuclear force holding the nucleus of an atom together. Electromagnetic forces holding the atoms together, and making molecules. Gravity attracting all massive objects to one another. Nature uses these forces to build planets, stars, even life itself. Engineers use these forces to manipulate matter in ever more amazing ways. Everything you see, hear, smell, or feel is physics in action.
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Ummmm... Are you talking about sprint cars? They have aluminum "wings" on top. They contribute to the aerodynamics of the car. They also allow for additional handling adjustments. The position of the wing determines air flow which can either loosen or tighten the handling of a car. :) If you want to see a picture check out http://www.billthomasracing.com/ or http://www.rtschassis.com/.
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All fluids are viscous.  Some are more so than others, and that has to do with how the fluid interacts with itself on a molecular level.
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Fluids have three ways of storing energy: temperature, pressure and velocity, and those are interchangeable (for instance, an aerosol can will exhange the compressed gas pressure and temperature energy for velocity: when using it, the velocity will increase and the temperature and pressure will drop).\nFor the Bernouilli principle, this is exactly whay is happening.  If you want to go faster withough adding energy to the system, the pressure has to drop -- that is how airplane wing work, the air above the wing has to go a bit faster because of the curvature and that creates a lower pressure, which "succion cups" the wing up.  And the effect is also available in reverse: lower the pressure actively, like with a vacuum cleaner, and the air will accelerate (evidently, that is how you get it to go in the vacuum cleaner in the first place).\nHigher pressure icreases velocity if you add it at first, that means add energy to the system.  As long as you only add pressure without allowing the fluid to expand that pressure and turn it into velocity (hence allowing to undergo a pressure drop) you will not get motion. Or you can lower the pressure downstream (like with the vacuum cleaner).
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Air has pressure, much like any gas.  By using this pressure it fills in cracks and crevices.
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things you can do to any motor to get more power\nK&N air filter not cheap but gaurenteed for 1,000,000 miles. you clean it when it gets dirty then reuse.\nSynthetic oil has more ability to cut down on friction .\nalso if you use a lighter oil it will also cut down on power loss because the oil is easyier to move \nelectric fan once again less parisitic power loss due to elemination of belt driven parts\nhope this helps.
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Because the air and all objects inside of the car are going the same speed as the car, try driving around a corner with a helium ballon. If you take a right corner the ballon will go to the right side of the car while you go to the left side.
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muscular system helps you move.....with out that you couldnt move anywhere......respiratory helps you breath.......circulatory helps the blood move through the body and other fluids get where they are going
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Find out how thermodynamics can improve daily life. Industrial apllications too.
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Basic Problem Solving technique.\nTo identify the real cause or root of a problem. For the engineer to understand this will allow him/her to improve the design.\n\ni.e. A car stops producing heat for the occupant. After checking the coolant supply which heats the heater core which air is blown across it is determined there is no coolant moving into the core. Further discovery the control valve is not working. One would stop here and just replace the valve. The engineer continues to research the problem with the vacuum driven diaphram to determine there is debris obstructing its movement. Why, because the valve is exposed to the rain/snow/salt (root cause) from the road. A new design helps to protect the valve from such common elements.