Ashley and Rachel are driving bumper cars. Ashley's bumper car is moving and she collides with Rachel's bumper car, which is not moving. Describe what happens to the momentum of both cars during this collision

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The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

The answer is that they are composed mostly of liquid water.