During an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much heat is added to the gas during this process?
A) 50 J B) 25 J C) -50 J D) -25 J E) 0 J
C
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Vision Problems: Farsightedness can usually be corrected with
A. converging lenses. B. diverging lenses. C. convex mirrors. D. cylindrical lenses. E. concave mirrors.
How does the work required to stretch a spring 2 cm compare with the work required to stretch it 1 cm?
a) same amount of work b) twice the work c) 4 times the work d) 8 times the work
A potential difference of 1.00 V is maintained across a 10.0-V resistor for a period of 20.0 s. What total charge passes by a point in one of the wires connected to the resistor in this time interval?
1.200 C 2.20.0 C 3.2.00 C 4.0.005 00 C 5.0.050 0 C
A spaceship captain lands on an unknown planet. Before venturing forth, he needs to find out the acceleration due to gravity on that planet
All he has available to him is some thin light string, a stopwatch, and a small 2.75-kg metal ball (it was a rough landing). So he lets the ball swing from a 1.5-m length of the string, starting at rest, and measures that it takes 1.9 s for it to swing from the place where he released it to the place where it first stops as it reverses direction. What is the acceleration due to gravity on this planet?