When a hot metal cylinder is dropped into a sample of water, the water molecules to reach the final temperature.

Explanation:

When a hot metal cylinder is dropped into a sample of water then heat is released by metal cylinder.

This heat is gained by water molecules and hence, they tend to gain kinetic energy. As a result, water molecules will move rapidly from one place to another. Hence, there will be increase in temperature of water.

Therefore, we can conclude that when a hot metal cylinder is dropped into a sample of water, the water molecules expand to reach the final temperature.

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