In 1991 the fly's eye detector in utah observed a cosmic ray with energy 320 eev (i eev-1018 ev). the identity of the primary particle is unknown, but it might have been a gamma ray. what is the photon wavelength for this energy? how does it compare to the size of a proton?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?