Physics 2 Test One Webassign Multiple Choice
Two cylinders A and B at the same temperature contain the same quantity of the same kind of gas. Cylinder A has three times the volume of cylinder B. What can you conclude about the pressures the gases exert?
A is 1/3 the pressure of B
If the volume of an ideal gas is doubled while its temperature is quadrupled, which of the following statements is true?
It increases by a factor of 2
A piece of copper is dropped into a beaker of water. (a) If the water's temperature rises, what happens to the temperature of the copper?
It rises
When an ideal gas undergoes an adiabatic expansion, which of the following statements is true?
No energy is delivered to the gas by heat
If a gas is compressed isothermally, which of the following statements is true?
The internal energy of the gas remains constant.
What would happen if the glass of a thermometer expanded more on warming than did the liquid in the tube? (
The scale on the thermometer is reversed so that higher temperature values would be found closer to the bulb
An amount of energy is added to ice, raising its temperature from -10°C to -5°C. A larger amount of energy is added to the same mass of water, raising its temperature from 15°C to 20°C. From these results, what can we conclude?
The specific heat of ice is less than that of water
Of the following, which is not a statement of the second law of thermodynamics?
When a system undergoes a change in state, the change in the internal energy of the system is the sum of the energy transferred to the system by heat and the work done on the system.
If a gas undergoes an isobaric process, which of the following statements is true?
Work is done on or by the gas.
Two samples of the same ideal gas have the same pressure and density. Sample B has twice the volume of sample A. What is the rms speed of the molecules in sample B?
equal to sample A
The second law of thermodynamics implies that the coefficient of performance of a refrigerator must be what? less than 1
finite
A poker is a stiff, nonflammable rod used to push burning logs around in a fireplace. For safety and comfort of use, the poker should be made from a material with which properties?
high specific heat and low thermal conductivity
A compact air-conditioning unit is placed on a table inside a well-insulated apartment and is plugged in and turned on. What happens to the average temperature of the apartment?
it increases
Assume you are measuring the specific heat of a sample of originally hot metal by using a calorimeter containing water. Because your calorimeter is not perfectly insulating, energy can transfer by heat between the contents of the calorimeter and the room. To obtain the most accurate result for the specific heat of the metal, you should use water with which initial temperature?
slightly lower than room temperature
