Amass of 9.2 kg is accelerated at 2.1 m/s2. what is the force?

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.