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ICP: Chapter 13
| Question | Answer |
|---|---|
| In order to calculate pressure exerted on a surface, what quantity is divided by the surface area? | force |
| If the air inside a balloon exerts a force of 1 N on an area of .5 m^2, what is the pressure inside the balloon? | 2 N/m^2 |
| A pressure of 10 N/m^2 equals | 10 Pa |
| Where is fluid pressure greatest? | 2 meters below the surface of a swimming pool |
| Which of the following materials is NOT a fluid? air, gasoline, water, cork | cork |
| Which of the following is NOT possible? | compressing 2 liters of water into a 1 liter volume |
| The pressure of a fluid at a specific depth | depends only on the type of fluid |
| Which principle states that a change in the pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all directions throughout the fluid? | Pascal's principle |
| The operation of a hydraulic lift system is explained by | Pascal's principle |
| The hydraulic system of a dump truck is designed to multiply | force |
| The upward force acting on the wing of an airplane in flight is called | lift |
| The upward force acting on an object submerged in a fluid is called | buoyant force |
| The pressure of air at sea level is approximately | 101 kPa |
| Two identical test tubes are filled with equal volumes of water and mercury. Which of the following statements is true? | the bottom area of each test tube is the same |
| Which of the following states Bernoulli's principle? | as the speed of a fluid increases, the pressure within the fluid decreases |
| A brick weighs 21 N. Measured underwater, it weighs 12 N. What is the size of the buoyant force exerted by the water on the brick? | 9 N |
| The strength of the buoyant force acting on an object in a fluid depends on the object's | volume |
| The buoyant force on an object in a fluid is equal to the weight of the | fluid displaced by the object |
| A ball is floating partially submerged in a liquid. The buoyant force acting on the ball equals the | weight of the ball |
| Two identical corks float in separate beakers. One beaker contains water. The other contains very salty water Which of the following statements is true? | Both corks are subject to the same buoyant force |
| A substance that flows and assumes the shape of its container is a(an) _______________. | fluid |
| As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom of the beaker __________________. | increases |
| The pressure exerted by a fluid at any given depth is exerted _____________ in all directions. | equally |
| A hydraulic jack is an application of _______________ principle. | Pascal's |
| As the speed of a fluid increases, the ________________ within the fluid decreases. | pressure |
| The downward force produced when air flows over the winglike spoiler on a race car is an example of ________________ principle. | Bernoulli's |
| The direction of the buoyant force on an object placed in a fluid is _____________. | upward |
| Even a rock at the bottom of a lake has a(an) ______________ force acting upward on it. | buoyant |
| The unit g/cm^3 is often used to express _____________. | density |
| A submerged submarine alters its _____________ to rise or fall in the water. | density |
| Rank the following measurements in order of increasing pressure: 2kPa, 10 N/m^2, 300 N/m^2, 0.1 Pa | 0.1 Pa, 10 N/m^2, 300 N/m^2, 2 kPa |
| For a fluid that is not moving, what are the two factors that determine the pressure that the fluid exerts? | the type of fluid, depth |
| Why aren't organisms that live on the seafloor crushed by water pressure? | they have high internal pressure |
| Why does a partially inflated weather balloon expand as it rises? | as altitude increases, pressure decreases |
| On what principle are hydraulic systems based? | Pascal's principle |
| A a ball of clay sinks when placed in water. The same piece of clay floats if it is made into the shape of a boat. Compare the volume of water displaced by the ball with the volume displaced by the boat shape. | boat shape displaces a greater volume of water |
| Compare the size and direction of the lift on a plane with its weight as it flies at a constant speed and altitude. | lift size equals the weight; the direction is opposite |
| When you weigh yourself on a bathroom scale, what buoyant force affects the weight reading? | buoyant force of the atmosphere |
| If you use a spring scale to measure the weight of a submerged object that has neutral buoyancy, what will the scale read? | zero newtons |
| Compare the weight of an object to the buoyant force acting on it if the object sinks in the fluid. | the buoyant force is less than weight |
| The dimensions of a brick that weighs 21 N are .19m x 0.090m x0.055m. What pressure does the brick exert on the ground if it is resting on its largest face? | 1228 Pa |
| Express a pressure of 2500 N/m^2 in kilopascals. | 2.5 kPa |
| In Figure 13-1, a force of 1000 N is exerted on Piston 1 of the hydraulic lift shown. What force will be exerted on Piston 2? | 9000 N |
| How did the position of the spoon in Figure 13-2 change after the faucet was turned on? | the spoon was attracted to the water |
| On which side of the spoon in Figure 13-2B is the pressure of the air greater? | the side farthest from the water |
| According to Bernoulli's principle, is the spoon shown in Figure 13-2B pulled toward the stream of water or pushed toward the stream of water? | pushed |
| In figure 13-2B, What effect does the stream of water have on the motion of the air around it? | causes the air to move |
Created by:
dakota_thornell2