An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadrant does this vector point?
a. 1st
b. 2nd
c. 3rd
d. None, since the object is now moving in the y-direction.
b
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The focal length of a concave mirror is 20 cm. What is its radius of curvature?
A) 10 cm B) 40 cm C) -40 cm D) 20 cm E) -20 cm
A variable resistor is connected to a constant voltage source. When the resistance is increased from 5.5 
to 9.3
what happens to the power dissipated?
A. no change B. a 35% decrease C. a 41% decrease D. a 59% decrease E. a 69% decrease
Which of the following is not true of the special theory of relativity?
A) The special theory does not apply to situations that involve substantial acceleration or gravity; for that, you need the general theory of relativity. B) For low speeds, the theory predicts effects that are so small that they cannot be noticed without extremely precise, high-tech measurement. C) The theory is valid only at speeds close to the speed of light. D) The theory tells us that there is no such thing as absolute time or space, because measurements of time and space depend on your reference frame.
When one travels west while passing over a time zone boundary (ignoring daylight savings time issues),
a. the date is decreased one day. b. the time is decreased one hour. c. the time is advanced one hour. d. the date is advanced one day. e. none of these occurs.