22. Water can be pumped out of a well using an old-fashioned farm-type pump because

A. the pump sucks the water up from the well. B. the water level is very close to the pump. C. the pump scoops up the water and lifts it to the top. D. the water is pushed to the surface by the atmosphere.

23. The main difference between gases and liquids is that in a liquid

A. distances between molecules are smaller. B. molecules collide less often. C. molecules are moving faster. D. distances between molecules are larger.

24. Which scientist is credited for developing the mercury barometer used to measure atmospheric pressure?

A. Robert Boyle B. Evangelista Torricelli C. Jacques Charles D. Blaise Pascal

25. Which has the larger buoyant force, a balloon filled with helium or the same size balloon filled with air?

A. The air balloon has the larger buoyant force. B. The helium balloon has the larger buoyant force. C. They both experience the same buoyant force. D. The balloon with the greater density has the larger buoyant force.

26. According to Pascal's principle,

A. liquids transmit pressure undiminished. B. liquids transmit pressure in one direction. C. when connected, a larger load piston will support a smaller load piston. D. liquids transmit pressure inversely.

27. The heat energy required to change 1 kg of a substance from a solid to a liquid state at the same temperature is called

A. specific heat capacity. B. heat of vaporization. C. sensible heat. D. heat of fusion.

28. A pulley can

A. multiply forces. B. reduce forces. C. change gravitational forces. D. use a fulcrum.

29. Watts and kilowatts are units of

A. power. B. energy. C. force. D. momentum.

30. In physics, for a given object, work divided by net force will equal

A. distance. B. time. C. impulse. D. velocity.

31. The reason a shower curtain will pull to the inside of a bathtub during a shower is that

A. there is more water inside the curtain. B. there is less air inside the curtain. C. there is less pressure inside the curtain. D. there is more pressure inside the curtain.

32. A woman can lift barrels a vertical distance of 1 meter or can roll them up a 2 meter long ramp to the same elevation. If she uses the ramp, the applied force required is

A. 1/4 as much. B. 1/2 as much. C. the same amount. D. 2 times as much.