The plates of a spherical capacitor have radii 6.25 cm and 15.0 crn. the space between the two spheres is filled with a material with dielectric constant of 4.8 calculate the capacitance. put your answer in the form of .abc x 100). f?

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?