| A | B |
|---|
| Definition of a Liquid? | Indefinite Shape, Definite Volume. |
| What would happen to the Earth if it were closer to the sun? | All the water on Earth will evaporate. |
| What would happen to the Earth if it were a little futher away from the sun? | All the water on Earth will freeze. |
| How much of the Earth's water is in Rivers | .0001 |
| How much of the Earth's water is in Oceans? | 97.2 |
| How much of the Earth's water is in the Atmosphere? | .001 |
| If you place a cube on top of another cube, how much pressure is going to be exerted on the bottom of the lower cube? | Double |
| If you double the amount of water in a cylinder, what will happen to the pressure in the cylinder? | Double |
| Density determines a liquids? | Weight and pressure. |
| Which has greater pressure- a 10 ml of mercury or 10 ml of water? | Mercury |
| If you have 20ml of water and mix it with 5ml of benzene, are they going to mix? | No, because they have a different density. |
| Which will have more pressure at the bottom, 20 ml and 200 ml ow water in cylinders? | 200 ml of water |
| The pressure of a liquid at rest depends only on? | Density and depth |
| What is the weight density of water | 9800 N |
| What is the pressure at the bottom of Lake Roosevelt at 60m deep? | Water density= 9800 X depth 60= 588000 |
| Can liquid be compressed? | No |
| In a liquid the density and pressure is? | Determined by Weight |
| Which lake needs to withstand greater pressure- big shallow lake with a 10m dam or deep small lake with a 20m dam | Small and deep 20 m dam lake |
| Pressure does not depend upon? | weight and volume |
| What is Buoyancy Force? | The upoword force exerted by a liquid on an object. |
| The buoyancy force acts always only in one direction? | upward |
| If the weight of an object is Greter than the buoyant force then the object will? | Sink |
| When the weight and buoyant force of an object equals then the object? | At any level |
| If the weight of an object is less then the buoyant force then the object? | Float |
| What is the term displacement mean? | water pushed aside |
| A completely submerged object always displaces? | A volume of liquid equal to its own volume. |
| Archimedes' Principle | An object immersed in a fluid is buoyed up by Q force equal to the weight of the fluid displaced. |
| A 500 kg rock weighs 4900 N and dispaces 3000 N of water when submerged. What is the weight of the rock underwater? | 1900 N |
| An object weights 200 N on land, when submerged underwater it displaces 100 N. What is the weight of the object underwater? | 100N |
| An object's buoyant force is determined by? | The volume displaced |
| Whether an object sinks or floats depends upon? | Both buoyant force and weight |
| If an object is less denser then the fluid is in, then the object will? | sink |
| If an object is less dense then the fluid is in, then the object will? | float |
| You can increase your density by? | Increasing your mass or decreasing your volume |
| How do submarines submerge or surface? | changing their mass |
| How are ships made to float? | Reshaping steel to displace enough water to keep them afloat |
| State the principle of flotation? | The weight of a floating object equals the weight of the water displaced by the submerged portion |
| A floating object displaces a? | An equal volume of water |
| State Pascal's Principle? | A change in pressure at any point in an enclosed fluid at rest are transmited undiminished to all points in the fluid in all directions |
| A 50 N force is exerted on a small piston of a hydraulic system, with a cross-sectional area of 0.015 m squared. What is the magnitude of the weight that can be lifted by the large piston, which has a surface area of .050 m squared? | 166.7 N |
| If a force of 200 N is exerted on a small piston of a hydraulic system, with a cross-sectional area of 0.005 m squared. What is the magnitude of the weight that can be lifted by the large piston, which has a surface area of .060 m squared? | 2400 N |
