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Pressure Science
Review for test on pressure
| Question | Answer |
|---|---|
| equation for pressure | P= F/A |
| Units for Pressure | N/M^2 |
| When does fluid pressure increase | fluid pressure increases when you are deeper down |
| When does fluid pressure decrease | fluid pressure decreases when higher up |
| Archimedes' Principle | An object in water is pushed up by a force equal to the weight of the water it pushes aside |
| Bernoulli's Principle | Pressure in a moving stream of fluid is less than the surrounding fluid |
| What is buoyancy | The upward force that acts against gravity |
| How do we breath | our diaphragm contracts and the low pressure causes our lungs to expand and out diaphragm expands and the high pressure causes our lungs to expand |
| How do hydraulic devices work | Low pressure goes in, low pressure gets equally distributed across a larger area |
| what do hydraulic devices do | produce enormous forces with small force applied |
| how do straws work. | when we suck, the air pressure gets low in the straw and it is higher in the liquid, so the liquid goes up the straw |
| when do things sink | when the buoyant force is less then the weight of the item |
| when do things float | when the buoyant force is more than the weight of the item |
| Equation for density | mass/volume |
Created by:
Tommybehnke