| A | B |
|---|
| Bernoulli's Principle says that as the speed of a fluid increases, the pressure in a fluid __________. | Decreases |
| The upward force on a wing that results from differences in pressure above and below the wing is called _______. | Lift |
| To design a successful airplane wing, the _______ brothers needed to apply Bernoulli's Principle. | Wright |
| Using Bernoulli's Principle, explain how a perfume atomizer works. | Moving air from bulb above tube lowers pressure. Difference in pressure between top and bottom of tube draws perfume upward. |
| Use Bernoulli's Principle to explain why the fabric of a domed tent bulges outward on a windy day. | Air outside tent is moving faster than air inside tent so has less pressure according to Bernoulli's Principle. The greater pressure inside the tent causes the fabric to bulge outward. |
| The density of water ______ when it freezes into ice. | Lowers |
| Whose principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object? | Archimedes |
| If you know the weight of an object that floats, you know the _______ force. | Buoyant |
| What is the force that acts in an upward direction, against the force of gravity, so it makes an object feel lighter in a liquid? | Buoyancy |
| A boat that weights 28,800 N is loaded with 7,200 N cargo. After it is loaded, what is the buoyant force acting on the boat? | 36,000 N |
| A substance that can easily flow is called a ____________. | Fluid |
| An instrument that measures pressure is called a ________. | Barometer |
| The downward pressure of the atmosphere on your hand is balanced by the ________. | Upward pressure of the atmosphere on your hand. |
| Snowshoes allow you to walk on the snow without sinking because they _________. | Distribute the force of your weight over a larger area. |
| Why dosesn't air pressure crush human beings standing at sea level? | Pressure from the fluids inside our bodies balances the air pressure outside. |
| If you divide the force exerted on a surface by the total area of the surface, you will know ________. | Pressure |
| If you divide the mass of an object by its volume, you know the object's ___________. | Density |
| What is the unit of pressure equal to N/m2? | Pascal |
| What is the unit of density when the area is measured in cubic centimeters and the mass is measured in grams? | Grams per cubic centimeter |
| A dollar bill measures about 15.9 cm x 6.7 cm. The Chinese yuan note measures 14.5 cm x 7.0 cm. Which currency uses a larger bill. | The dollar bill - the area is 110 cm2 and the yuan note has an area of 100 cm2 |
| How does atmospheric pressure change as you move away from the surface of the Earth? | Decreases |
| Pressure decreases as the area over which a force is distributed. | Increases |
| By comparing ______, you can predict whether an object will float or sink in a fluid. | Density |
| A helium balloon rises because helium is _________ than air. | Less dense |
| An object that weights 340 N floats on a lake. What is the weight of the displaced water? | 340 N |
