Instead of thymine, RNA uses the nucleotide base
A) guanine
B) uracil
C) adenine
D) cytosine
B
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Conservation of Momentum: A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the momentum change during the collision is correct? (There could be more than one correct choice.)
A. The truck experiences the greater magnitude momentum change. B. The small car experiences the greater magnitude momentum change. C. The small car and the truck experience the same magnitude momentum change. D. The magnitude of the momentum change experienced by each one is inversely proportional to its mass. E. The magnitude of the momentum change experienced by each one is directly proportional to its mass.
What are we seeing in this Hubble Space Telescope photograph?
A) Almost every object in the photo is a galaxy, and these galaxies are at many different distances from us. B) This photo shows the Virgo supercluster of galaxies. C) Most of the dots in this photo are stars in the Milky Way, but we see a few blotches that represent galaxies beyond the Milky Way. D) This is the Local Group of galaxies.
As a wave-generating object moves through a medium, the waves behind
A) bunch up. B) stretch out. C) neither of these
The joule
a)is a unit in the British system b)can be used as a unit for either work or energy. c) is a unit of power. d) can only be used to designate mechanical kinetic energy.