Which of the following would cause the frequency of a wave to increase?
a. increasing the amplitude
b. decreasing the amplitude
c. increasing the wavelength
d. decreasing the wavelength

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.