Where do the photons in the cosmic background radiation originate?
A) the moment of the Big Bang
B) the end of the Planck era
C) during the era of nucleosynthesis
D) the end of the era of nuclei
E) during the era of galaxy formation
D
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The Schwarzchild radius is defined for a given mass M as the radius for which the escape velocity would be exactly equal to the speed of light, c. What is the expression for this radius in terms of G, M, and c?
What will be an ideal response?
Observations of the cosmic background radiation from the COBE satellite revealed tiny variations in its temperature by about 1 part in 100,000
Indicate whether the statement is true or false
A slump is a form of
a) glacial flow. b) wave erosion. c) landslide. d) groundwater accumulation. •
The mass of an atom of carbon-12 (Z = 6) is less than the mass of 6 protons and 6 neutrons because of binding energy
Indicate whether the statement is true or false