41.
Gold is sold by the troy ounce (31.103 g). What is the volume of 1 troy ounce of pure gold?
42.
Mercury is commonly supplied in flasks containing 34.5 kg (about 76 lb.). What is the
volume in liters of this much mercury?
43.
What is the mass of a deep breath of air having a volume of 2.00 L? Discuss the effect taking
such a breath has on your bodyàvolume and density.
44.
A straightforward method of finding the density of an object is to measure its mass and then
measure its volume by submerging it in a graduated cylinder. What is the density of a 240-g
rock that displaces 89.0cm3 of water? (Note that the accuracy and practical applications of
this technique are more limited than a variety of others that are based on Archimedes°rinciple.)
45.
Suppose you have a coffee mug with a circular cross-section and vertical sides (uniform
radius). What is its inside radius if it holds 375 g of coffee when filled to a depth of 7.50 cm?
Assume coffee has the same density as water.
46.
A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the
tank if it is 0.500-m wide by 0.900-m long? (b) Discuss whether this gas tank has a
reasonable volume for a passenger car.
47.
A trash compactor can compress its contents to 0.350 times their original volume. Neglecting
the mass of air expelled, by what factor is the density of the rubbish increased?
48.
A 2.50-kg steel gasoline can holds 20.0 L of gasoline when full. What is the average density
of the full gas can, taking into account the volume occupied by steel as well as by gasoline?
54.
What pressure is exerted on the bottom of a gas tank that is 0.500-m wide and 0.900-m long
and can hold 50.0 kg of gasoline when full?

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