While surface conditions differ greatly, name three ways that Venus and Earth are indeed "sister planets."
What will be an ideal response?
No other two planets in the solar system are so similar in size, mass, density, and surface gravity.
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Three identical 3.0-µC charges are placed at the vertices of an equilateral triangle that measures 30 cm on a side. What is the magnitude of the electrostatic force on any one of the charges? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 1.6 N B) 1.8 N C) 2.0 N D) 2.2 N E) 2.4 N
Express (2.2 × 106)-1/2 in scientific notation
A) 6.7 × 10-4 B) 1.5 × 103 C) 1.5 × 10-5 D) 1.5 × 104
Case 1: An electron is released from rest in a uniform electric field. Case 2: A proton is released from rest in a uniform electric field of the same magnitude as in case 1 . How does the electric potential energy of the charge-field system behave in these cases?
a. In case 1 the potential energy increases, but in case 2 it decreases. b. In both cases, the potential energy increases. c. In case 1 the potential energy decreases, but in case 2 it increases. d. In both cases, the potential energy decreases.
General Questions: A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?
A. more than 700 N B. less than 700 N C. 700 N D. It could be more or less than 700 N, depending on whether the elevator is going up or down.