A bat at rest sends out ultrasonic sound waves at 494khz
A bat at rest sends out ultrasonic sound waves at 49.4kHz and receives them returned from an object moving directly away from it at 23.2m/s. What is the received sound frequency?
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A bat at rest sends out ultrasonic sound waves at 49.4kHz, What is the received sound frequency
A pn-junction is formed in silicon by doping one side with acceptor atoms at concentration Na = 10^19 cm^(-3) and another side with donor atoms at Nd = 10^18 cm^(-3). What is the dopant concentration on the p-type side and on the n-type side
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