How do most of the heavier elements up to iron form in the universe?
A. by nucleosynthesis in the cores of massive stars
B. in supernova explosions
C. in the cores of protostars
D. in the original interstellar clouds
Answer: A
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A person on the ground floor of a skyscraper ages
A) faster than a person on the top floor. B) slower than a person on the top floor. C) at the same speed as a person on the top floor.
Electrons are used to produce X-rays by allowing a beam of electrons to strike a heavy metal surface. When the intensity of the electron beam is increased, this results in:
A. X-rays being produced having longer wavelength B. X-rays being produced having higher energy C. More X-rays produced per unit time D. Faster X-rays being produced
Answer the following statement(s) true (T) or false (F)
1. The quantity Z in the expression 
depends on the temperature T of the reservoir.
2. At a sufficiently high temperature, an oscillator in an Einstein solid is more likely to have one unit of energy than no energy at all.