In a process called pair production, an energetic
gamma ray is converted into an electron and
a positron. it is not possible for a gamma ray to be
converted into two electrons because
(1) charge must be conserved
(2) momentum must be conserved
(3) mass-energy must be conserved
(4) baryon number must be conserved

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.