In order to produce beats, the two sound waves should have
A) the same amplitude.
B) slightly different amplitudes.
C) the same period.
D) the same frequency.
E) slightly different frequencies.
E
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If the resistance in a circuit using an ideal (no internal resistance) battery is increased, then
A. the voltage difference maintained by the battery does not change. B. the current coming out of the battery does not change. C. the power output of the battery does not change. D. All of these choices are correct
Which of the following is NOT a property of neutrinos?
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Household circuits are wired in parallel. Adding more appliances to a parallel circuit
A. increases the voltage sent to each appliance. B. decreases the current sent to each appliance C. increases the current drawn from the circuit but does not change the current to each appliance.