| A | B |
|---|
| pressure | force that particles of a fluid exert over a certain area due to their weight and motion |
| hydraulic device | a machine that takes advantage of the fact that pressure is transmitted equally in all directions in a liquid |
| buoyant force | upward force in a fluid that exists because the pressure of a fluid varies with depth |
| buoyancy | the phenomenon caused by the upward force of fluid pressure-the ability to float |
| Archimedes'principle | explanation that says that the buoyant force on an object is equal to the weight of the fluid displaced by the objects |
| density | mass of a substance divided by its volume |
| Bernoulli's principle | explanation that the pressure in a moving stream of fluid is less than the pressure in the surrounding fluid |
| Pressure = | force divided by area |
| Fluids move from... | areas of high pressure to areas of low pressure |
| An object floats when it displaces... | a volume of a fluid whose weight is greater than or equal to its own weight. |
| An object floats when its density... | is less than the density of the surrounding fluid. |
