A15,000-watt radio station transmits at 1700 khz. calculate the energy of a single photon at the transmitted frequency. a). 1.1 x 10^ -27 j/photon b). 9.9 x 10^ -30 j/photon c). 1.1 x 10^ -30 j/photon

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

Convection occurs when thermal energy is transferred by the movement of

Why do atoms emit energy of only specific wavelengths