The molecules in a room-temperature glass of water jostle around at

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The molecules in a room-temperature glass of water jostle around at a great variety of speeds. This is because they are constantly colliding with each other and with the container in which they are held, leading to a wide range of speeds and velocities. This is what makes thermal energy and heat possible, as the faster-moving molecules transfer their energy to other slower-moving ones, leading to an overall increase in temperature.

The Molecules in a Room-Temperature Glass of Water Jostle Around