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1) A piece of glass is broken into two pieces of different size. How do their densities compare? a. Density of the initial piece > density of the larger broken piece > density of the smaller broken piece b . All densities (initial piece, and both broken pieces) are equal Ao Bo C. Density of the initial piece PB > PC 2 ) An iceberg floats in a shallow sea. What can you say about b. PB > PA = Pc the pressures at the point underneath the iceberg and the . PC > PB > PA point a mile away from the iceberg at the same depth? d. PB > PA and PB > Pc a. The pressure underneath the iceberg is greater. e. Pc > PA and Pc > PB b. The pressures are the same. 7) Which contains more molecules, a mole of hydrogen gas ( C. The pressure a mile away from the iceberg is or a mole of oxygen gas (Oz)? greater. 3) A heavy lead block and a light aluminum block of equal sizes a. The hydrogen The oxygen are both submerged in water. Upon which is the buoyant They each contain the same number of molecules. force greater? d. Can't tell without knowing their temperatures. a. On the lead block. 8) The ideal-gas model is valid if b. On the aluminum block. The gas density and temperature are both low. C. They both experience the same buoyant force. a. 4) Two blocks are of identical size. One is made of lead and sits The gas density and temperature are both high. on the bottom of a pond; the other is of wood and floats on The gas density is low and the temperature is high. top. Upon which is the buoyant force greater? . The gas density is high and the temperature is low. a. On the lead block. 9) An ideal-gas process in which the volume doesn't change is b . On the wood block. called c. They both experience the same buoyant force. a. Isobaric. 5) A fisherman rows his boat out to his favorite spot on a pond, b. Isothermal. where he decided to drop a heavy anchor from his boat. Isochoric. When he drops the anchor into the pond, what happens to d. Isentropic. the water level of the pond? 10) What is the name of an ideal-gas process in which no heat is a. The level of the water in the pond decreases. transferred? b. The level of the water in the pond stays the same. a. Isochoric C. The level of the water in the pond increases. b. Isentropic 6) Fluid is flowing from left to right through a pipe shown in the C. Isothermal drawing. Points A and B are at the same height, but the cross- d. Isobaric sectional areas of the pipe are different at the two locations. Adiabatic Points B and C are at two different heights, but the cross- 11) W is the works done by the system. Ws is the work done by sectional areas of the pipe are the same at these two the surroundings. In an isothermal expansion, locations. Rank the pressures at the three locations in order a. W = 0 and Ws > 0 from lowest to highest. b. W O and Ws = 0 d. W > O and Ws 0 12) In an isothermal expansion, a. Q >0 Q=0 Q