Term
| force per unit area that is applied on the surface of an object |
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Definition
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Term
| What is the formula for pressure? |
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Definition
| pressure (Pa)= force (N) / area (m2) or P=F/A |
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Term
| What is the SI unit for pressure? |
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Definition
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Term
| One Pascal is equal to a force of what? |
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Definition
| 1N (applied over an area of 1m2, or 1=Pa+1N/m2 |
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Term
| Does pressure increase or decrease if the force applied increases or the area decreases? |
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Definition
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Term
| What is another way of saying 1000Pa? |
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Definition
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Term
| What is any substance that has no definate shape and has the ability to flow? |
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Definition
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Term
| What fluid is the sun made of? |
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Definition
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Term
| When what of a fluid above a surface is greater, the pressure exerted on the surface byt the fluid is greater? |
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Definition
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Term
| Pressure exerted by a fluid increases with what? |
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Definition
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Term
| The pressure on objects in a fluid is exerted on all sides in what direction to the surface of the object? |
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Definition
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Term
| What exerts about 100,000N of force over every square meter on Earth? |
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Definition
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Term
| Atmosphere pressure does what as elevation in the atmosphere increases? |
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Definition
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Term
| What measures atmospheric pressure? |
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Definition
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Term
| What is an upward force that is exerted by a fluid on any object in the fluid? |
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Definition
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Term
| What is the buoyant force caused by? |
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Definition
| the pressure exerted by a fluid |
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Term
| The portion of the object that is deeper in the fluid will have what kind of force pushing it upward than the force pushing downward? |
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Definition
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Term
| If the weight of an object is greater than the force, gravity will cause the object to what? |
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Definition
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Term
| If the buoyant force is equal to or greater than the object's wight the object will what? |
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Definition
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Term
| Weight can be spread out over what kind of surface area to to increase buoyancy? |
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Definition
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Term
| What doesn't change with depth? |
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Definition
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Term
| What does buoyant force depend on? |
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Definition
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Term
| What is the buoyant force on an object that is equal to the weight of the fluid it dispaces? |
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Definition
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Term
| mass of an object divided by its volume |
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Definition
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Term
| Any object witha density greater than the density of the fluid it is placed in will... |
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Definition
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Term
| Any object with a density less than the desity of the fluid it is placed in will... |
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Term
| Fluids rest and while in motion what cna they do that does useful work? |
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Definition
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Term
| Pushing on a fluid can increase what? |
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Definition
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Term
| When a force is applied ot a fluid in a closed container, the pressure throughout the fluid increases by the same amount. |
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Definition
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Term
| What is a fluid increase an applied force? |
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Definition
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Term
| When the speed of a fluid increases, the pressure exerted by the fluid decreases. |
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Definition
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Term
| Where will a fluid move from a higher pressure environment to what kind of pressure environment? |
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Definition
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Term
| What can increase the rate at which smoke rises in a chimney? |
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Definition
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Term
| What decreases the air pressure outside a house and the roof can be pushed off the house by the higher pressure of the still air inside? |
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Definition
| hurricanes and other high winds |
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Term
| What produces a force that allows planes and birds to fly? |
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Definition
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Term
| What is created by downward flowing air which exerts an upward reaction force on the wing? |
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Definition
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Term
| Planes and birds have various wing shapes depending on what? |
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Definition
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Term
| What have long, narrow wings that help them glide long distances? |
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Definition
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Term
| What kind of airplanes have small, narrow, tapered wings to help them fly at high speeds? |
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Definition
| swallows, swifts, falctions, and jet fighters |
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Term
| What kinds of birds have short, rounded wings that allow for quick take-offs and sharp turns? |
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Definition
| forest and field birds (pheasants) |
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