Resonance occurs with forced vibration that requires the
A) least amount of energy input.
B) maximum amount of energy input.
C) matching of wave amplitudes.
D) matching of constructive and destructive interference.
E) minimum beat frequency.
Answer: A
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Two particles A and B have identical charge Q. For a net force of zero to be exerted on a third charged particle it must be placed:
A) midway between A and B B) on the perpendicular bisector of the line joining A and B but away from the line C) on the line joining A and B, not between the particles D) on the line joining A and B, closer to one of them than the other E) at none of these places (there is no place)
Force F required to hold the 75-lb weight in equilibrium is:
(A) 37.50 lb
(B) 18.75 lb
(C) 56.25 lb
(D) 25.0 lb
Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their de Broglie wavelength will
A) increase by a factor of 4. B) increase by a factor of 2. C) decrease by a factor of 2. D) increase by a factor of . E) decrease by a factor of .
Atoms or ions that have the same electron configurations are termed
a) isoelectronic. b) covalent. c) electronegative. d) metallic.