what is the maximum velocity of an electron ejected from a charged copper plate with a work function of 7.44 x 10^-19 is illuminated with ultraviolet rays that have a frequency of 1.28 x 10^15

where’s the list ? the question is incomplete

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.