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Wittaler [7]
4 years ago
13

When the molecules in the air become less dense (as in the process of hearing), ______ has occurred.

Chemistry
1 answer:
Dahasolnce [82]4 years ago
4 0

Explanation:

Whenever there occurs a decrease in the density of a substance then this is known as rarefaction.

For example, when particles of a gas become more dispersed or spread out then it means they have gained more kinetic energy. As a result, there will occur a decrease in mass of the gas and increase in volume of the gas.

As density is mass divided by volume. Hence, decrease in mass will also lead to a decrease in density of the gas.

Therefore, we can conclude that when the molecules in the air become less dense (as in the process of hearing), rarefaction has occurred.

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