The amplitude of a wave is 1 meter. The crest-to-trough distance of the wave is
A) 0.5 m.
B) 1 m.
C) 2 m.
D) none of the above
Answer: C
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Which ancient culture had the greatest known success in predicting eclipses?
A) Aztecs B) Mayans C) Egyptians D) Babylonians E) Greeks
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg • m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg • m2, what is the final angular speed?
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The voltage across the input terminals of a transformer is 110 V. The primary coil has 50 loops and the secondary has 25 loops. The output is
A) 25 V. B) 55 V. C) 110 V. D) 220 V. E) none of the above