As the police car approaches a brick wall it emits a sound
As the police car approaches a brick wall it emits a sound at 800Hz. The speed of the car is 100km/h. Find the beat frequency recorded by the driver of the police car as it approaches the wall. (Take the speed of sound 340m/s)
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The current through a coil having a resistance of 6 ohms and inductance of 2 H is 4 ampere. Calculate the instantaneous value of the current 50 ms after the supply is cut off.
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As the police car approaches a brick wall it emits a sound at 800Hz. The speed of the car is 100km/h. Find the beat frequency recorded by the driver of the police car
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