Molar Specific Heats: A certain ideal gas has a molar specific heat at constant volume 7R/2. What is its molar specific heat at constant pressure?
A. 5R/2
B. 3R/2
C. 8R
D. 9R/2
E. 6R
Answer: D
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A projectile is launched vertically upward at 50 m/s. If air resistance does affect motion, then its speed upon returning to its starting point is
A) less than 50 m/s. B) 50 m/s. C) more than 50 m/s.
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37° south of west. Which of the following is correct?
a. R = 0.40 km, and the car's speed is decreasing. b. R = 0.20 km, and the car's speed is decreasing. c. R = 0.20 km, and the car's speed is increasing. d. R = 0.16 km, and the car's speed is increasing. e. R = 0.16 km, and the car's speed is decreasing.
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A) less than g. B) the same. C) more than g.
The net charge on a charged capacitor depends on
A) the area of the capacitor plates. B) the distance between the capacitor plates. C) the medium between the capacitor plates. D) all of the above E) none of the above