Two oppositely travelling beams of electrons, each having a total energy of 0.851667 MeV and 0.63875 MeV as observed in the lab. What are their respective velocities, momenta, and kinetic energies? What is the relative speed of an electron in the inertial reference system another electron?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)