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# Ch 11 Review Guide

Question | Answer |
---|---|

Pressure | The force exerted on a surface divided by the total area over which the force is exerted |

Archimedes' Principle | the rule that the buoyant force acting on a submerged is equal to the weight of the volume of fluid displaced by the object |

Density | The Ratio of the mass of a substance to its volume |

Pascal (The Unit Measure) | A unit of pressure equal to 1 newton per square meter |

Fluid | A material that can easily flow |

Buoyant Force (Buoyancy) | The upward force exerted by a fluid on a submerged object |

4 Forces on airplanes | Lift, Drag, Thrust, and weight |

Pascals Principle | The rule that when force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid |

Bernoulli's Principle | the rule that the faster a fluid moves, the less pressure the fluid exerts |

Hydraulic System (Definition, How it works) | A hydraulic system multiplies force by applying the force to a small surface area. The increase in pressure is transmitted to another part of the confined fluid, which pushes on the larger surface area |

How does pressure change with elevation? With Depth? | The Deeper You got the more pressure there is from the water pressure above you |

Unit of measure for mass | Grams (g) |

Unit of Measure for force | Newtons (N) |

Unit of measure for Pressure (there are three) | Pascals (P), N/m2, kg/m |

How does Lift Work? | There's a difference at the bottom and top of the wing, the pressure above the wing has less pressure then the pressure below it making it lift |

How do Density and buoyancy determine if an object sinks or floats? | depending on the density of the object the object will sink or float if there's a light density buoyancy will lift it up |

Unit of measure for area | Centimeters (cm) |

Unit of measure for volume | Liter (l) |

Density of Water | one gram per milliliter |

Unit of measure for density | Mass (m) |

Unit of Measure for Buoyancy | Newtons (N) |

Formula for Area | Length x Width |

Formula for Velocity | Velocity = Distance/Time |

Formula for Force (and weight) | Force = m x a |

Formula for Density | d = m/v (Density = Mass/Volume) |

Formula for Pressure | Pressure = Force/ Area ( p = f/A) |