Why do some of the staples stick to the nail?

Explanation:

When the bar magnet picks up a nail, it magnetizes the nail. The domains of the nails temporarily align in one direction and it acts like a magnet. The nail becomes a temporary magnet. Therefore, when the tip of the nail touches some staples, the staples get attracted by the nail and sticks to it.

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.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19