The spherical side mirror on a car is convex and has a radius of curvature of 25 cm. Another car is following, 20 m behind the mirror. If the height of the car is 1.6 m, how tall is its image?
A) 2.0 cm B) 5.0 cm C) 3.0 cm D) 4.0 cm E) 0.99 cm
E
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The website shown in the above figure shows an example of a(n) ______.
A. carousel B. slide show C. card layout D. tabbed window
The excess charge on this sphere is closest to
A) 700 nC. B) 79 nC. C) 0.35 nC. D) 315 nC. E) 350 nC.
What happens when you drop a clock into a black hole?
A. The clock appears to be advancing at its normal rate both from the point of view of an outside observer and from the point of view of an observer falling with the clock. B. The clock appears to be advancing rapidly from the point of view of an outside observer, but normally for an observer falling with the clock. C. The clock appears to be advancing slowly from the point of view of an outside observer, but normally for an observer falling with the clock. D. The clock appears to be advancing slowly both from the point of view of an outside observer and from the point of view of an observer falling with the clock. E. The clock appears to be advancing rapidly both from the point of view of an outside observer and from the point of view of an observer falling with the clock.
Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. If there is no air resistance, the maximum height of Joe's ball will be
A) four times that of Bill's ball. B) two times that of Bill's ball. C) equal to that of Bill's ball. D) eight times that of Bill's ball. E) roughly 1.4 times that of Bill's ball.