question archive Q1) Two spaceships are moving away from Earth in opposite directions, one at 0
Q1) Two spaceships are moving away from Earth in opposite directions, one at 0
Subject:PhysicsPrice:3.86 Bought11
Q1) Two spaceships are moving away from Earth in opposite directions, one at 0.76*c, and one at 0.69*c (as viewed from Earth). How fast does each spaceship measure the other one going?
Q2) The kinetic energy of the electron in a neural hydrogen atom (one electron around one proton) is 13.6 eV. The mass is 9.109 * 10^{-31} kg. What fraction of the electron's total relativistic energy (including the rest energy) is the electron's kinetic energy?
