The absolute magnitude scale is defined so that a difference of five magnitudes is a luminosity difference of ________
Fill in the blank(s) with correct word
100X, or a factor of 100
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Which is a current good approximation for the speed of light?
a. 186,000 meters per second. b. 3 × 10^8 meters per second. c. 3 × 10^8 miles per second. d. 3 × 10^18 meters per second. e. 333 meters per second.
Potential Energy: A point charge of +3.00 ?C and a second charge Q are initially very far apart. If it takes 29.0 J of work to bring them to a final configuration in which the +3.00-?C charge is at the point x = 1.00 mm, y = 1.00 mm, and the second charge Q is at the point x = 1.00 mm, y = 3.00 mm, find the magnitude of the charge Q. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 2.15 ?C B. 4.30 ?C C. 10.74 ?C D. 4.30 nC
A rifle bullet is fired horizontally at the same instant another bullet is allowed to drop from rest at the same height. Which bullet strikes the earth first?
A. Both strike at the same instant B. The bullet allowed to drop C. The bullet from the rifle
If you were looking at a weather map with isobars drawn on it, what would you look for to find the area where the horizontal pressure gradient is the strongest?
a. An area where isobars are close together. b. An area where there are not isobars. c. An area where isobars are far apart. d. None of the above.