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Exit Testing
Consider two atoms of a gas in a container. Atom #1 is large and dense, but Atom #2 is small and less dense. The atoms freely
move around the container, but after a few seconds the two atoms collide. Describe what happens as the two atoms collide with one
another.
D
A.
The larger, denser atom is able to transfer its energy to the smaller atom, so the overall kinetic energy stays the same.
B.
C
D.
The smaller atom is forced to stop when it comes in contact with the larger atom, so the overall kinetic energy decreases
slightly.
The smaller, less dense atom is able to transfer its kinetic energy to the larger atom, so the overall kinetic energy increases
slightly.
The two atoms collide and keep their own kinetic energy. This elastic collisions between the two atoms does not change the
total kinetic energy.