How is a nuclear power plant similar to a coal burning power plant?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?