Cosmological redshift is the result of ________
A) the high speeds at which galaxies move within clusters
B) very old, red stars in distant galaxies
C) the expansion of the universe
D) supermassive black holes
C
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If the Sun's surface were cooler, how would its appearance change?
A) It would appear more red. B) It would appear more blue. C) It would become bright white. D) It would stay the same.
A 20.0-kg traffic light hangs midway on a cable between two poles 30.0 meters apart. If the sag in the cable is 0.40 meters, what is the tension in each side of the cable?
a. 9.8E+1 N b. 9.8E+3 N c. 3.7E+3 N d. 3.8E+2 N e. 2.0E+4 N
Fossilized tree resin is called ______________
Fill in the blank(s) with correct word
A diatomic quantum mechanical rotator in the L = 1 quantum state has energy E. The same rotator in the L = 2 quantum state will have energy
A) 2E. B) 3E. C) 6E. D) 8E. E) none of the given answers