Harmonic frequencies are:
a. mathematically unrelated to the fundamental frequency.
b. all the same.
c. 2, 4, 8, 16, ..., etc. times the lowest frequency.
d. whole-number multiples of the fundamental frequency.
e. squares of the fundamental frequency.
d
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An atom's "atomic number" is
A) the number of protons in its nucleus. B) the number of electrons orbiting the nucleus of the neutral atom. C) Both of the above. D) the number of electrons orbiting the nucleus of the ionized atom. E) All of the above.
A lens that is thicker at the center than at the edge is
a. a diverging lens only. b. a convex lens only. c. a converging lens only. d. both a convex lens and a converging lens.
A 1.8-kg block is released from rest at the top of a rough 30° inclined plane. As the block slides down the incline, its acceleration is 3.0 m/s2 down the incline. Determine the magnitude of the force of friction acting on the block
a. 4.2 N b. 3.0 N c. 3.4 N d. 3.8 N e. 2.3 N
When gaseous elements combine:
a. infinite amounts of each gas can combine in the same space because gases are not matter. b. very precise ratios of each gas combine to form gaseous compounds. c. gases only combine as mixtures, not as compounds. d. most cannot form compounds because they are already in the form of diatomic (i.e. two-atom) molecules. e. they form compounds with unpredictable ratios of each element.