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9L Pressure & Moment
questions on pressure and moments @ AJHS
| Question | Answer |
|---|---|
| What is the pressure on an object equal to? | force per unit area (force divided by area) |
| Which scientist is responsible for the principle that an increase in velocity of fluid will result in the decrease in pressure? | Bernoulli |
| What is the pressure if the force is 100N on an area of 4m2? | 25 n/m2 |
| What happens to air pressure when you drive down from a high mountain? | increases |
| If you are walking on snow with snowshoes, what happens to the pressure on the snow? | is less |
| When the speed of a fluid increases, pressure? | decreases |
| When you go deep into a pool the pressure on your ears? | increases |
| What would cause an increase in gas pressure in a sealed, flexible container? | decrease in volume |
| The direction of fluid pressure is | perpendicular to the surface of an object |
| What is the SI unit for pressure? | Pascal |
| What is pressure all around us called? | Fluid pressure also called atmospheric pressure |
| Pressure is equal to | force divided by area |
| What measures atmospheric pressure | barometer |
| Pressure will increase if | the force increases or the area decreases |
| What happens to atmospheric pressure as elevation increases? | decreases |
| Pascal's principle states that | the force (speed) on a fluid increases, pressure increases |
| What does wind do to the smoke coming out of the chimney? | increases it. |
| Air at sea level is | is 100,000 N |
| Equation used to find pressure | p= f/a |
| Barometer | instrument used to measure air pressure |
| Fluid pressure | pressure in liquids and gases |
| Buoyant force | upward force that is exerted by a fluid |
| When air is compressed, density | remians the same |
| A fluid is | any substance with no definite shape and can flow |
| Atmospheric pressure is | 100,000 PA |
| Lift | needed to make an airplane fly |
| Density | mass divided by volume |
| Fluid pressure | pressure in gases and liquids |
| How much pressure is there when 300 n of force is applied over an area of 60 m2 | 5 n/m2 |
| What is the pressure if the force is 90n and the area is 15 m2 | 6 n/m2 |
| Force = 250n , area = 75m2 what is the pressure | 3.33 n/m2 |
| What is the force if the pressure is 16n/m2 and the area is 10 m2 | 160 n |
| True or False: Air is more compressed at sea level than high altitudes. | True? |
| Which principle states as the speed of a fluid increases, the pressure decreases | Bernoulli's principle |
| Pascal's principle | a force applied to a fluid in a closed container, pressure throughout the fluid increases the same amount |
| pressure | the amount for force acting on a surface p=f/a |
| This is pumped into ballast tanks to decrease density. | air |
| Principle that is used to determine buoyant force | Archimedes |
| Explains why the buoyant force on a rock that displaces 5N of water is 5N | Archimedes Principle |
| Caused by the weight of the atmosphere | atmospheric pressure |
| Device used by submarines to control density | ballast tank |
| Principle that states that the pressure in a fluid decreases as the fluid's velocity increases | Bernoulli |
| Force exerted on an object that increases as the density of the fluid increases | bouyant |
| The formula for this is mass/volume | density |
| Amount of matter in a given volume | density |
| Force that works against the forward motion on a plane | drag |
| An object whose weight equals the buoyant force will... | float |
| Can be liquid or gas. Takes the shape of its container | fluid |
| An upward force on an object that moves in a fluid | lift |
| SI unit of pressure | Pascal |
| The formula for this is force/area | pressure |
| As depth increases, so does this. | pressure |
| An object that weighs more than the buoyant force will do this? | sink |
| Organ used by fish to stay afloat | swim bladder |
| Forward force produced by an airplane's engine | thrust |
| Irregular flow of fluids | turbulence |
Created by:
johncl
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