Q3: A 2500 W speaker is used at an outdoor rock concert. What is the sound level 45 meters away from the speaker?

Calculate the energy of the photons emitted by the AM radio station.

Ques:

An AM radio station broadcasts at 1030 kHz, and its FM partner broadcasts at 98.1 MHz.

A) Calculate the energy of the photons emitted by the AM radio station.

B) Calculate the energy of the photons emitted by the FM radio station.

C) Compare the energy of the photons emitted by the AM radio station with the energy of the photons emitted by the FM radio station. 

A photon has an energy E and wavelength \lambda beforescattering from a free electron. After scattering through a 140°,the photon's wavelength has increased by 11.0%.

Find the initial wavelength of the photon in pm.
Find the initial energy of the photon in fJ.

the photon of energy 125Kev scatter at an angle 65 degree with the target.Find the final wavelength of the photon?