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| Presure is a force exerted over an area on the surface of an object |
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| The unit of pessure equalto 1 NEWTON per sq, meter |
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| a substance that can easily flow |
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| What does Barometer mean? |
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| An instrument used to measure at mosperic pressure. |
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| what are the three princeiples? |
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| Archimede's; Pascals; Bernoullis |
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| the ratio of the mass of a substance to its volume |
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What is the term that is an SI unit of pressure?
-liter
-weight
-newton
-pascal |
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Definition
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| What causes the pressure exerted by a fluid? |
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Definition
| all of the forces exerted by the indivual particles in a fluid combine to make up the pressure exerted by the fluid. |
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| The ________ of a substance, no matter what state of shape is its mss per unit volume. |
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| In a hydraulic system, how is the force applied on a small surface area multiplied? |
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Definition
| The increase inpressure, is then transmitted to another part of the confined fluid, which pushes on larger surface area. |
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| Explain why a sheet of tissue paper rises when you blow air above the tissue paper rises when you blow air above the tissue paper. |
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Definition
| The curved shape of the paper gives itlift. B/c the top of the paper id curved, air moving over the top has a grerater speed than air moving under the bottom. The air moving over the top exerts less pressure than the air below. The differance in air pressure above & below the paper creates lift. |
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| Describe how molecules move in fluids. |
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Definition
| The particules that makeup a fluid move constantly in all directions. When a particle collides w/ a surface it exerts a force on the surface. |
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Term
| What causes air pressure? |
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Definition
| the weight of the force that produces or atmosphere pressure. |
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| What instrument can be used to measure atmospheric pressure? |
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| The bouyant force acts in the direction opposite to the force of gravity, so it makes an object feel lighter |
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| Decribe Archimedes' Princeiple. |
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Definition
| The rule that the bouyant force on an object is equal to the weight of the fluid the object displaces. |
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| Decribe Pascal's Principle. |
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Definition
| The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. |
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| Decribe Bernoulli's Principle. |
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Definition
| The rule that a stream of fastmoving fluid exerts less pressure than the surounding fluid. |
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| Buoyancy is the ability to _________ |
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Definition
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| What did pascal discover? |
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Definition
| He discovered thaat pressure increases by the same amount throughout an enclosed or confined fluid. |
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| How do u use Pascal's Principle? |
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Definition
| A hydrolic device works by applying a force to an enclosed fluid. |
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| What is Bernoulli's Principle? |
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Definition
| It states that as thespeed of a moving fliud increases, the pressure decreases. |
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| How do u use Pascal's Principle? |
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Definition
| A hydrolic device works by applying a force to an enclosed fluid. |
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| How do u use Pascal's Principle? |
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Definition
| A hydrolic device works by applying a force to an enclosed fluid. |
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Term
| Dceribe Archimedes' Principle. |
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Definition
| Asubmerged object displaces a volume of fluid equal to its own volume. |
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| Archimedes' principle staes... |
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Definition
| that the buoyant force acting on a submerged object is equal to the weight of the fluid the object displaces. |
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| If air moves faster ABOVE an object... |
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Definition
| fluid pressure pushes the object upward. |
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| If the air moves faster BELOW the object... |
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Definition
| fluid pressure pushes it downward. |
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Term
| the curved shape of an airplane wing to move _______ than the air beneath the wing. |
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| _____ moves quickly past the top of the tube causing ______ pressure |
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| Wind blowing across the top of a chimmney _________ the air pressure. |
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| The _______ pressure at the bottom pushes air and smoke ____ the chimney. |
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| Aflying disk usses a curved upper surface to create ________. |
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