Betelgeuse is the brightest star of which constellation?
a. Orion
b. Ursa Minor
c. Ursa Major
d. Southern Cross
e. Cassiopeia
a
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Spectra from neutral atoms compared with spectra from ionized atoms of the same element
A) are the same. B) are slightly redshifted. C) are slightly blueshifted. D) have different sets of spectral lines. E) have the same sets of spectral lines but different widths for those lines.
Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 4 sin (5x) cos (6t) where x is in m and t is in s. What is the approximate frequency of the interfering waves?
a. 3 Hz b. 1 Hz c. 6 Hz d. 12 Hz e. 5 Hz
Which of the following materials would you expect to have the lowest Young’s modulus?
(a) Aluminum metals (b) Alumina ceramic (c) Polyvinylchloride (d) Rubber
The vertical columns of elements in the periodic table are called
a. periods. b. groups. c. families. d. series.