Photoelectrons with a maximum speed of 8.00 × 107 m/s are ejected from a surface in the presence of light with a frequency of 7.50 × 1014hz. if the mass of an electron is 9.10 × 10-31 kg, calculate the maximum kinetic energy of a single electron, in joules.

7.28 × 10-23 j
5.82 × 10-15 j
2.91 × 10-15 j
3.41 × 10-16 j