If two sounds are at slightly different frequencies, beats can be heard at a frequency equal to the difference in frequency of the two sources
Indicate whether the statement is true or false
TRUE
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If the speed of light is represented by c, what equation would you use to determine the distance light travels, x, in a time t?
A. x=c*t B. x=c/t C. x=c+t D. 1/x = c*t
The average density of neutron stars approaches:
A) a million times that of normal matter. B) a million times that of even a white dwarf. C) about 1017 kg/m3, similar to the density of atomic nuclei. D) about 1018 times that of water. E) infinity.
Two lasers emit equal numbers of photons per second. If the first laser emits red light and the second emits blue light, the power radiated by the first is
A. equal to that emitted by the second. B. greater than that emitted by the second. C. less than that emitted by the second. D. dependent on the time interval of the emission.
The name of the NASA mission(s) that landed on Mars in 1976 was
A) Viking I and II. B) Magellan. C) Venera 14. D) Galileo. E) Voyager.