While sitting in your car by the side of a country road, you

Last updated: 7/10/2022

While sitting in your car by the side of a country road, you see your friend, who happens to have an identical car with an identical horn, approaching you. You blow your horn, which has a frequency of 260 Hz; your friend begins to blow his horn as well, and you hear a beat frequency of 6.2 Hz. How fast is your friend approaching you? Express your answer to two significant figures and include the appropriate units.