Answer:
300,000,030m/s
Explanation:
Using the relationship between frequency and speed of a wave;
F ∝ V
F = kV
k = F/V
F1/V1 = F2/V2 = k
Let F1 be the frequency of the radio wave = 2,000,000.0Hz
V1 be the speed of light = 300,000,000m/s
F2 = frequency produced by the car = 2,000,000.2Hz
V2 be the velocity of the moving car
Substituting this values in the equation above;
2,000,000/300,000,000 = 2,000,000.2/V2
Cross multiplying
2,000,000V2 = 300,000,000×2,000,000.2
2V2 = 300×2,000,000.2
V2 = 150×2,000,000.2
V2 = 300,000,030m/s
The velocity of the car is 300,000,030m/s
