What is the lowest level to which water can erode land?
A) sea level
B) the bottom of the stream channel
C) the level of the delta
D) none of the above
Answer: A
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We know that light is quantized because, in the double slit experiment with light,
A) when dim light is used, the light hits the screen at tiny separated impact points. B) when the experiment is done in strong light, no interference pattern shows up on the screen. C) an interference pattern shows up on the screen. D) when one slit is closed, the light hits the screen at tiny separated impact points. E) when one slit is closed, no interference pattern shows up on the screen.
A traveler has about $536 in his checking account, about $2107 in his savings account and exactly $7.62 in his wallet. To the greatest precision warranted, how much money does this shopper have?
A) $2651 B) $2,650 C) $2,650.6 D) $2,650.62 E) $2,650.620
Rank the following kinds of waves according to their speeds from fastest to slowest:
(a) gamma rays (b) microwaves (c) radio waves (d) visible light (e) x-rays
1.c > b > d > e > a 2.b > c > e > b > a 3.a > e > d > b > c 4.e = a = c = d = bIf an electron is placed at rest near a bar magnet, the electron will
A. accelerate away from the negative pole of the magnet. B. move in a circular path around the north pole of the magnet. C. not move at all. D. be attracted to the positive pole of the magnet.