Two charges lie on the x axis, +2q at the origin, and ?3q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
a. 1.0 m.
b. 2.0 m.
c. 2.5 m.
d. 3.0 m.
e. 4.0 m.
b
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An ice cube in a glass of water is pushed to the bottom of the glass and held there with a straw. Consequently, the buoyant force on the ice cube is now
A. the same as when the cube was floating at the top. B. exactly balanced by the force exerted only by the straw. C. exactly balanced by the weight of the ice cube. D. greater than when the cube was floating at the top.
You feel warm from the Sun at the beach because of heat radiation
a. True b. False Indicate whether the statement is true or false
The current in an RLC circuit when driven at resonance depends on
A. the resonance frequency. B. the resistance. C. the inductive reactance. D. the capacitive reactance. E. More than one of these choices are correct.
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.