Hubble’s parameter
A. Gerard de Vaucouleurs |
B. Georges Lemaître |
C. Hubble’s Law |
D. Edwin Hubble |
E. Velocity or Speed |
F. Ho |
Answer: F. Ho
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Metric System: The volume of a 10-mL test tube is equivalent to which one of the following quantities?
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Suppose you measure the density (mass per volume) of an object moving by you at very high speed. How will its density compare to the density it would have at rest in your reference frame?
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In a head-on automobile collision, a person's momentum could be reduced from 2000 kg m/s to zero in just 0.1 s. If this occurs, the average force exerted to stop the person is
A. 2,000 N. B. 20,000 N. C. 200 N. D. This can't be answered without knowing the person's mass