A gun of mass 500g fires a bullet of mass 10 g with a speed of 100m/s. Find;
i. initial momentum of 'gun + bullet'
ii. Momentum gained by the bullet after firing
iii. Recoil velocity of the gun

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9