Complete the following exercises.
1. What is the source of all waves?2. A water wave vibrates up and down four times each second, the distance between two successive crests is 5 meters, and the height from the lowest part to the highest part of the wave is 2 meters.
a. What is the frequency of the wave in hertz?
b. What is the period of the wave in seconds?
c. What is the speed of the wave in meters per seconds?
d. What is the amplitude of the wave in meters?3. When you sit in the stands at a baseball stadium, you will hear the crack of the bat a short time after you see the batter hit the ball. Explain.4. Why is the moon sometimes described as silent?5. You are hiking in a canyon and you notice an echo. You decide to let put a yell and notice it took 2 seconds before you heard the echo of your yell. How far away is the canyon wall that reflected your yell?6. Explain how the Doppler effect is used by the police to measure the speed of a car.7. The light from the sun has higher frequencies from one side of the sun than from the other side. What does that tell you about the sun?8. What is the source of all electromagnetic waves?9. Why is the lettering on the front of an ambulance backwards (see figure below)?