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.
c
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A cantilever beam is loaded as shown in the figure. The bending moment at 0.5 m from the support is approximately:
(A) 12.7 kN?m
(B) 14.2 kN?m
(C) 16.1 kN?m
(D) 18.5 kN?m
A proton, moving west, enters a magnetic field of a certain strength. Because of this magnetic field the proton curves upward. What is the direction of this magnetic field?
A) towards the west B) towards the east C) towards the south D) towards the north E) downward
Which of these bodies are most likely to break up over time?
A) Trojan asteroids B) jovian satellites C) Kuiper Belt bodies D) asteroids in the main belt E) comet nuclei
An object is placed 10 cm in front of a mirror, and an image is formed that has a magnification of 2 . Which of the following statements is false?
a. The focal length of the mirror is 20 cm. b. The image is virtual. c. There is enough information to select the correct answer. d. This is the only true statement.