3925329
Description
| Question | Answer |
| What is pressure? | Force per unit area. |
| What is the unit of pressure? | Pascal |
| What is the equation for pressure? | pressure p= force/ area |
| can pressure be transmitted through a fluid? | Yes |
| How does a hydraulic system work? | It uses the pressure in a fluid to exert force. |
| The force exerted by a hydraulic system depends on the pressure and the area of the cylinder that exerts force. True or false? | True |
| How does the pressure in a liquid increase? | The pressure in a liquid increases with the depth and of density. |
| What is the U-tube manometer used for? | To measure gas pressure |
| What is the mercury barometer used for? | To measure atmospheric pressure. |
| Describe the arrangement of the molecules in a solid? | Molecules in a solid are in a rigid structure. |
| Describe the arrangement of the molecules in a liquid? | Molecules in a liquid move about in contact with each other ( loose formation). |
| Describe the arrangement of the molecules in a gas? | Molecules in a gas are far apart and move about at a high speed. |
| What happens when you increase the temperature of a gas? | The speed of its molecules increase |
| What is the pressure of the gas on a surface caused by? | The molecules repeatedly hitting the surface |
| How does the pressure of a gas increase in a sealed container? | If the gas temperature is increased. |
| what is the brownian motion? | The eratic |
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