The work function is the energy that must be supplied to cause the release of an electron from a photoelectric material. The corresponding photon frequency is the threshold frequency. The higher the energy of the incident light, the more kinetic energy the electrons have in moving away from the surface. The work function for mercury is equivalent to 435 kJ/mol photons.

(a) Can the photoelectric effect be obtained with mercury by using visible light? Explain.

(b) What is the kinetic energy, in joules, of the ejected electrons when light of 215 nm strikes a mercury surface?

(c) What is the velocity, in meters per second, of the ejected electrons in part (b)?