A mass m travels at speed 3c/5, and another mass m sits at rest. (a) Find the energy and momentum of the two particles in the lab frame.

Why there is no inductive reactance in dc circuits

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?