A bit of space debris penetrates the hull of a spaceship traversing the asteroid belt and comes

Question:

A bit of space debris penetrates the hull of a spaceship traversing the asteroid belt and comes to rest in a container of water that was at 20.0°C before being hit. The mass of the space rock is 1.0 g and the mass of the water is 1.0 kg. If the space rock traveled at 8.4 × 103 m/s and if all of its kinetic energy is used to heat the water, what is the final temperature of the water?