A ball of m and speed v collide head on with a ball of mass 2m and speed v/2, if the two balls stick together their speed after the collision is

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Which two particles are found in the center of an atom