The expression(s) indicating the number of nucleons in a nucleus is
a. A
b. N
c. Z
d. Z + N
e. A – Z
A, D
Physics & Space Science
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Based of cellular biochemistry, how many different domains can life be classified into?
A) 4 B) 3 C) 2 D) 1
Physics & Space Science
If you heat a gas so that collisions are continually bumping electrons to higher energy levels, when the electrons fall back to lower energy levels the gas produces
A) thermal radiation. B) radio waves. C) an absorption line spectrum. D) an emission line spectrum. E) X-rays.
Physics & Space Science
As air rises, it expands. It expands because it moves to
A) a region of higher air pressure. B) a region of lower air pressure. C) an area of greater humidity. D) an area of cooler air temperature.
Physics & Space Science
Distinguish an E0 from an E7 galaxy
What will be an ideal response?
Physics & Space Science