If the accepted value of H were to double,
A) the critical density would be halved.
B) the age of the universe would be twice as old as we originally believed.
C) the age of the universe would be half what we believed.
D) the ages of the oldest globular clusters would be invalid.
E) the Copernican principle would not be valid beyond our solar system.
C
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The principle of superposition states that the top layer of rock is
A) igneous. B) the youngest. C) sedimentary. D) the oldest.
Describe retrograde motion
What will be an ideal response?
Which equation is correct for wave speed?
A) wave speed = frequency x wavelength B) wave speed = (1/period) x wavelength C) both of these D) neither of these