The half life of uranium 235 a can be increased by using a catalyst b is a constant c can be decreased by decreasing the temperature d depends on the amount of uranium present

radiation warms things up temp rises convection currents air circ windy weather

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

your answer is, orbit around the nucleus