Which of the following is true about low-mass stars compared to high-mass stars?
A) Low-mass stars are cooler and less luminous than high-mass stars.
B) Low-mass stars are hotter and more luminous than high-mass stars.
C) Low-mass stars are cooler but more luminous than high-mass stars.
D) Low-mass stars are hotter but less luminous than high-mass stars.
E) Low-mass stars have the same temperature and luminosity as high-mass stars.
A
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Radioactivity Basics: When a ?- particle is emitted from an unstable nucleus, the atomic mass number of the nucleus
A. increases by 1. B. decreases by 1. C. increases by 2. D. decreases by 2. E. does not change.
Exhibit 12-3
The graph below shows a plot of angular velocity in rad/s versus time in s from t = 0 s to t = 7 s.
?
?
Use this exhibit to answer the following question(s).
Refer to Exhibit 12-3. The change in angular position, ??, during the 7-second period is
A. 21 rad, CW. B. 21 rad, CCW. C. 30 rad, CW. D. 30 rad, CCW. E. 39 rad, CCW.
The Lyman series of hydrogen is made up of those transitions made from higher levels to n = 1 . If the fifth line in this series has a wavelength of 94 nm, what is the wavelength of the sixth line?
a. 106 nm b. 93 nm c. 117 nm d. 102 nm e. 124 nm
The planets move ________ through the sky, relative to the background stars.
A. west to east B. retrograde C. northeast to southwest D. east to west E. None of these choices is correct.