Which galaxy, as observed, has aged the most since it was born?
A) a very distant galaxy
B) a nearby galaxy
C) The distance of a galaxy doesn't matter.
B
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The process of removing an electron from a stable nucleus is known as
a. ionization. b. Doppler broadening. c. collisional broadening. d. a red shift. e. quantum mechanics.
Kirchhoff's Rules: A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the current I1 if the batteries are ideal. (It is not necessary to solve the entire circuit.)
A. 0 A B. +0.2 A C. +0.4 A D. -0.2 A E. -0.4 A
The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3 . What is the shortest wavelength in that series? (R = 1.097 × 10^7 m?1 and 1 nm = 10?9 m)
a. 1875 nm b. 820 nm c. 1580 nm d. 656 nm e. 1094 nm
If we double the resistance in a circuit but keep the current in it constant, the power dissipated by that circuit will
A) be four times as great. B) be two times as great. C) be one-half as great. D) be one-fourth as great.