Which of the following wavelengths could NOT be present as a harmonic on a 2-m-long string?
A. 4 m
B. 2 m
C. 1 m
D. 0.89 m
E. 0.5 m
Answer: D
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A) about 4 days B) about 4 hours C) about 4 seconds D) about 4 minutes
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a. True b. False Indicate whether the statement is true or false
Power is transmitted at high voltages because the corresponding current in the wires is
A) also high to deliver appreciable power to distant places. B) low so that overheating of the wires is minimized. C) either of these D) neither of these