A 120-V power supply connected to a 30-ohm resistor will produce amps of current
1 answer:
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Answer:
Explanation:
Since the sound bouncing back from car has greater frequency , the car must be moving towards the police car . If v be the velocity of car
f =
f is apparent frequency , f₀ is original frequency , V is velocity of sound and v is velocity of car
1270 =
1.02419 =
348.22-1.02419v =340 +v
2.02419v = 8.22
v = 4.06 m /s
B)
In this case , we shall take relative velocity in place of velocity of car .So
v = 20+4.06
= 24.06 m /s
f =
=
1240 x
= 1428 Hz .