What is the approximate diameter of the largest asteroid?
A) 100 km B) 10 km C) 1,000 km D) 1 km E) 10,000 km
C
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Two identical containers, A and B, hold equal amounts of the same ideal gas at the same Po, Vo and To. The pressure of A then decreases by a half while its volume doubles; the pressure of B doubles while its volume decreases by a half. Which statement correctly describes the temperatures of the gases after the changes?
a. TA = 0.5TB = To. b. TB = 0.5TA = To. c. TB = TA = To. d. TA = 2TB = To. e. TB = 2TA = To.
When steam condenses, the H2O
1) releases energy. 2) absorbs energy. 3) neither of these. When water freezes, the H2O 4) releases energy. 5) absorbs energy. 6) neither of these.
Which of the following statements is correct?
a. You only need to know the amount of thermal energy a body contains to calculate its temperature. b. The temperature of a body is directly proportional to the amount of work the body has performed. c. The quantity of thermal energy exchanged by two bodies in contact is inversely proportional to the difference in their temperatures. d. The quantity of thermal energy exchanged by two bodies in contact is directly proportional to the difference in their temperatures. e. Different amounts of thermal energy are transferred between two bodies in contact if different temperature scales are used to measure the temperature difference between the bodies.
If force was selected as a fundamental dimension rather than mass, the units of density would be:
