Which of the following sound frequencies lie(s) in the audible range?
a. 13 Hz
b. 5 kHz
c. 1 MHz
d. All of these
b
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A colloid is a ______________ mixture.
Fill in the blank(s) with the appropriate word(s).
Relativity is the
A) study of how space, energy, and mass are related to time. B) concept that there are no absolutes that can be postulated. C) idea that space bends in relationship to the square of the mass contained within it. D) study of wormholes and time travel.
As the index of refraction gets larger:
a. light bends less for a given angle of incidence. b. the angle of incidence gets larger. c. light bends more for a given angle of incidence. d. the angle of incidence gets smaller. e. it has no effect on how the light bends.
Faraday's law of induction states that the emf induced in a loop of wire is proportional to
A) current divided by time. B) the magnetic flux. C) the time variation of the magnetic flux. D) the magnetic flux density times the loop's area.