Acommon unit used to measure the energy of small particles is the electron volt (ev ev ), which is equal to the magnitude of the charge on the electron (measured in coulombs c c ) multiplied by 1 volt (v v ). in chapter 17, you will learn that coulombs multiplied by volts is equivalent to mass multiplied by length squared and divided by time squared. 1)which of the following quantities could be written in ev ev and why explain your answer? case a: gravitational potential energy mgh m g h , where m m is the mass of the object, g g is the acceleration due to gravity (length divided by time squared), and h h is the height of the object measured with respect to a reference position. case b: electric potential energy qδv q δ v , where q q is the charge of the particle in coulombs and δv δ v is the potential difference in volts through which the particle is being accelerated. case c: rest energy mc2 m c 2 , where m m is the mass of the object, and c c is the speed of light (length divided by time).