What is the mass of 2 moles of carbon dioxide?
a. 88 g
c. 64 g
b. 80 g
d. 56 g
A
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What does Hubble's law tell us?
A) The longer the period of a Cepheid variable, the greater its luminosity. B) The more distant a galaxy, the faster it is moving away from us. C) The faster a spiral galaxy's rotation speed, the more luminous it is. D) For every force, there is an equal and opposite reaction force.
The Mohs scale is based on how many minerals?
a. 8 b. 10 c. 12 d. 15
Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2sin(?x)cos(3?t), where x is in m and t is in s. What is the distance (in m) between the first two antinodes?
A. 8 B. 2 C. 4 D. 1 E. 0.5
Daily afternoon thunderstorms along the Gulf Coast are most likely caused by a
A) continental tropical air mass. B) continental polar air mass. C) maritime tropical air mass. D) maritime polar air mass.