Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# 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