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 6.0hz .

how fast is your friend approaching you?

express your answer to two significant figures and include the appropriate units.

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.