A neutron of mass m moving with velocity v collides head-on and elastically with a stationary nucleus of mass M. Show that the velocity of the nucleus after the collision, U=(2m/m+M)^v​

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength