4. while sitting in a canoe, you encounter a wave disturbance created by a passing motorboat. your canoe bobs up and down every 2.5 s and the average distance between wave crests moving your boat is 3.6 m. how fast is the wave moving?
5. electromagnetic radiation travels at a speed of 3.0 x 108 m/s.
a. what is wavelength of a radio wave that has a frequency of 3.5 x105 hz?
b. what is the frequency of an x-ray that has a wavelength of 2.5 x 10-10 m?