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Physics 19, 20, 21
Vocabulary and Formulas for The Physics test on 1-21-10
| Question | Answer |
|---|---|
| Formula for Pressure | P=Force/Area |
| Pressure Due to Liquid Formula | Pressure Due To Liquid=density*g*depth |
| Density =... | Mass / Volume |
| When the weight of a submerged object is greater than the buoyant force, the object will... | sink |
| Buoyant Force | The net upward force exerted by a fluid on a submerged or immersed object. |
| Bouyancy | the apparent loss of weight of objects when submerged in a liquid |
| When the weight of a submerged object is less than the buoyant force, the object will... | float |
| Archimedes' Principle states that... | the buoyant force on an immersed object is equal to the weight of the fluid it displaces. (also true for liquids and gasses) |
| The Principle of Flotation is... | a floating object displaces a weight of fluid equal to its own weight. |
| Pascal's Principle | changes in pressure at any point in an enclosed fluid at rest are transmitted undiminished to all points in the fluid and act in all directions |
| Atmospheric Pressure is caused by... | the weight of air |
| Device to measure the pressure of the atmosphere | Barometer |
| Boyle's Law | the product of pressure and volume for a given mass of gas is a constant as long as the temperature doesn't change. |
| Boyle's Law Formula is... | P1V1=P2V2 |
| An object that is less dense than the air around it will ..... | rise |
| Bernoulli's Principle States that... | when the speed of a fluid increases, pressure in the fluid decreases, and vice-versa |
| Streamlines are | the smooth paths or trajectories of the bits of fluid |
| Lift is | the upward force created by the difference between the air pressure above and below the wing of an airplane. |
| In order for horizontal flight to be possible, what has to equal the lift. | Weight |
| 0 degrees Kelvin is equal to ____ degrees Celsius | -273 |
| Absolute Zero is when | an object has no kinetic energy to give up |
| Heat is... | energy that transfers from one object to another because of a temperature difference between them |
| The higher the temperature of a substance the ________ it's motion of molecules | faster |
| When 2 substances of different temperatures are in thermal contact... | heat flows from the higher temperature substance into the lower-temperature substance |
| thermal contact | when heat flows from one object or substance to another one it is in contact with, the two objects are in thermal contact. |
| Thermal Equilibrium | After objects in thermal contact with each other reach the same temperature, they are in thermal equilibrium. |
| Internal Energy is defined as... | The grand total of all energies inside a substance. |
| When a substance gives off or takes in heat, it's internal energy ________ | changes |
| A calorie is | the amount of heat required to raise the temperature of 1 Gram of water by 1 Degrees Celsius |
| Most forms of matter- solids, liquids, and gasses- ____1____ when they are heated and ____2______ when they are cooled. | 1. expand 2. contract |
| Bimetallic Strip is when... | 2 strips of metals are welded or riveted together. |
| A thermostat is | a practical application of a bimetallic strip that is used to control temperature. |
Created by:
ryan.lynch5
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