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

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.