An object that completes 10 vibrations in 20 seconds has a frequency of
A) 0.5 hertz.
B) 2 hertz.
C) 200 hertz.
Answer: A
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A bar magnet is dropped from above and falls through the loop of wire shown below. The north pole of the bar magnet points downward towards the page as it falls. Which statement is correct?
A. The current in the loop always flows in a clockwise direction. B. The current in the loop always flows in a counterclockwise direction. C. The current in the loop flows first in a clockwise, then in a counterclockwise direction. D. The current in the loop flows first in a counterclockwise, then in a clockwise direction. E. No current flows in the loop because both ends of the magnet move through the loop.
The terrestrial planets in our solar system are
A) Mercury, Venus, Earth, and Mars. B) Jupiter, Saturn, Uranus, and Neptune. C) Mercury, Venus, Earth, Mars, and Pluto. D) Jupiter, Saturn, Uranus, Neptune, Pluto, and Eris.
We find most stars still on the main sequence because this stage takes ________
Fill in the blank(s) with correct word
What potential difference is required across an 8.0-? resistor to cause a 2.0 A current through it?
What will be an ideal response?