Photoelectrons with a maximum speed of 7.00 × 10 6 m/s are ejected from a surface in the presence of light with a frequency of 8.00 × 10 14 Hz. If the mass of an electron is 9.10 × 10 -31 kg, calculate in joules the maximum kinetic energy of a single electron.

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

Which governments provide garbage collection services to homes and businesses

Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.