When a positive charge is released and moves along an electric field line, it moves to a position of
a. lower potential and lower potential energy.
b. lower potential and higher potential energy.
c. higher potential and lower potential energy.
d. higher potential and higher potential energy.
e. greater magnitude of the electric field.
a
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Suppose it were possible to drill a frictionless cylindrical channel along a diameter of the Earth from one side of the Earth to another. A body dropped into such a channel will only feel the gravitational pull of mass within a sphere of radius equal to the distance of the mass from the center of the Earth. The density of the Earth is 5.52 × 103 kg/m3 and G = 6.67 × 10?11 N?m2/kg2. The mass will oscillate with a period of
A. 84.4 min. B. 169 min. C. 24.0 h. D. 1 130 h. E. 27.2 d.
A rubber ball and a lump of putty have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The putty sticks to the wall
Which objects experiences the greater momentum change? A) the ball B) the putty C) Both experience the same non-zero momentum change. D) Both experience zero momentum change. E) Cannot be determined from the information given.
The flattest of all the ellipticals are class ________
Fill in the blank(s) with correct word
If a long spring with spring constant k is cut into 4 equal lengths, what is the spring constant of each of the 4 shorter springs?
a. It is still k. b. It is k/4. c. It is 4k. d. It is k/16. e. It is k + 4.