Aspeeding car is pulling away from a police car. the police car is moving at 30 m/s. the radar gun in the police car emits an electromagnetic wave with a frequency of 20.0 x 109 hz. the wave reflects from the speeding car and returns to the police car where the frequency is measured to be 4750 hz less than what was emitted. the speed of light is 3 x 108 m/s. how fast is the speeding car going?

65.625 m/s

Explanation:

c = Speed of light = 3×10⁸ m/s

Relative speed

Relative speed = 35.625 m/s

Velocity of speeder = Velocity of police car + Relative speed

⇒Velocity of speeder = 30 + 35.625 = 65.625 m/s

∴ Velocity of speeder is 65.625 m/s

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.