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A police officer at rest by the side of a highway uses her speed gun to send an ultrasound wave of frequency 41.2 kHz to
Posted: Fri May 06, 2022 12:16 pm
by answerhappygod
- A Police Officer At Rest By The Side Of A Highway Uses Her Speed Gun To Send An Ultrasound Wave Of Frequency 41 2 Khz To 1 (34.23 KiB) Viewed 30 times
A police officer at rest by the side of a highway uses her speed gun to send an ultrasound wave of frequency 41.2 kHz towards a car that is moving directly towards her at a speed of 33.0 m/s. Interference between the wave reflected from the car and the wave emitted by the speed gun produces beats. Calculate the beat frequency. (Speed of sound = 330 m/s) 1.2 kHz 8.2 kHz 4.1 kHz 9.2 kHz 4.6 kHz