| Term | Definition |
|---|
| pressure | _______ is the force per unit area that is applied on the surface of an object. |
| decreases | When your weight is distributed over a larger area, the pressure you exert on the area _______. |
| increases, decreases | Pressure _____ if the force applied increases, and ______ if the area of contact increases. |
| pascal | The unit of pressure in the SI system is the _______ (Pa). |
| 1 N | One pascal is equal to a force of ____ applied over an area of 1m². |
| 1 N/m² | 1 Pa=______ |
| area | The way to change the pressure that is exerted on an object is to change the _____ over which the force is applied. |
| P=F/A | pressure equation |
| fluid | A ______ is any substance that has no definite shape and has the ability to flow |
| plasma | Gases, liquids, and even ________ are types of fluids. |
| decreases | Atmospheric pressure ______ with altitude. |
| barometer | A _____ is an instrument used to measure atmospheric pressure. |
| increases | The height of the liquid in the barometer ______ in the tube as the atmospheric pressure increases. |
| greater | When the height of a fluid is greater, the pressure at the bottom of the container is ______ |
| sides | The pressure on all objects in a fluid is exerted on all _____ perpendicular to the surface of the object, no matter what shape it is. |
| fluids | The pressure exerted outward by the _____ inside your body balances the pressure exerted by the atmosphere. |
| buoyant force | the ____ ____ is an upward force that is exerted by a fluid on any object in the fluid. |
| pressure | the buoyant force is caused by the ____ that is exerted by a fluid on an object in the fluid. |
| all | a buoyant force acts on ___ objects that are placed in a fluid, whether they are floating or sinking. |
| upward, gravity | the buoyant force pushes an object _____ but _____ pulls the object downward. |
| equal | if the buoyant force is ____ to the object's weight, the forces are balanced and the object floats. |
| shape | the buoyant force does depend on the ____ of the object. |
| doesn't | the buoyant force ____ change with depth. |
| archimedes' principle | ______ ____, the buoyant force on an object is equal to the weight of the fluid it displaces. |
| density | _____ of a fluid or an object is the mass of the object divided by the volume it occupies. |
| less | any object with a density ____ than the fluid it is placed in will float. |
| greater | any object with a density ______ than the density of the fluid it is placed in will sink. |
| pascal's principle | _____ _____, when a force is applied to a fluid in a closed container, the pressure in the fluid increases everywhere by the same amount. |
| hydraulic system | _____ ____ uses a fluid to increase an input force. |
| bernoulli's principle | ____ ____, when the speed of a fluid increases, the pressure exerted by the fluid decreases. |
| third | bernoulli's principle agrees with Newtons ____ law of motion. |
| increasing | lift can be increased by ______ the size or surface area of the wing. |
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