An eagle flying at 28 m/s emits a cry whose frequency is 370 hz. I’d like for this moving in the same direction as the eagle at 10.78 m/s. The speed of the eagle is 11m/s. What frequency does the blackbird hear (in hz) after the eagle passes the background?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct