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Chapter 18: Q10P (page 541)
An aluminum flagpole 33 m ishigh. By how much does its length increase as the temperature increases by ?
The increase in length due to its temperature increase is 0.001m.
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A hot object is dropped into a thermally insulated container of water, and the object and water are then allowed to come to thermal equilibrium. The experiment is repeated twice, with different hot objects. All three objects have the same mass and initial temperature and the mass and initial temperature of the water are the same in the three experiments. For each of the experiments, Fig. 18-29 gives graphs of the temperatures Tof the object and the water versus time t. Rankthe graphs according to the specific heats of the objects, greatest first.
Calculate the minimum amount of energy, in joules, required to completely meltof silver initially at.
A 0.530 kgsample of liquid water and a sample of ice are placed in a thermally insulated container. The container also contains a device that transfers energy as heat from the liquid water to the ice at a constant rate P, until thermal equilibrium is reached. The temperatures Tof the liquid water and the ice are given in Figure as functions of time t; the horizontal scale is set by(a) What is rate P? (b) What is the initial mass of the ice in the container? (c) When thermal equilibrium is reached, what is the mass of the ice produced in this process?
Question: A gas thermometer is constructed of two gas-containing bulbs, each in a water bath, as shown in Figure. The pressure difference between the two bulbs is measured by a mercury manometer as shown. Appropriate reservoirs, not shown in the diagram, maintain constant gas volume in the two bulbs. There is no difference in pressure when both baths are at the triple point of water. The pressure difference is 120 torr when one bath is at the triple point and the other is at the boiling point of water. It is 90.0 torrwhen one bath is at the triple point and the other is at an unknown temperature to be measured. What is the unknown temperature?
Two constant-volume gas thermometers are assembled, one with nitrogen and the other with hydrogen. Both contain enough gas so that.(a) What is the difference between the pressures in the two thermometers if both bulbs are in boiling water? (Hint: See Fig. 18-6) (b) Which gas is at higher pressure?
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