If two adjacent frequencies of an organ pipe closed at one end are 500 Hz and 700 Hz, what is the length of the organ pipe? (vsound = 340 m/s)
a. 0.85 m
c. 1.50 m
b. 1.25 m
d. 1.70 m
A
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A. 3.4 Hz B. 0.28 × 10-3 Hz C. 0.52 Hz D. 1.6 Hz
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A 120-V rms voltage at 1000 Hz is applied to a series RLC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit?
A) 240 ? B) 120 ? C) 100 ? D) 0 ? E) 200 ?
According to the laws of thermal radiation, hotter objects emit photons with
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