Inhaling Helium Increases the Pitch of Your Voice

question 22

Multiple Choice

Inhaling helium increases the pitch of your voice.One reason for this is that sound travels

• A)slower in helium than in air.
• B)faster in helium than in air.
• C)the same speed in helium,but the wavelength is greater.

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Definitions:

Pollution

The introduction of contaminants into the natural environment that cause adverse changes and harm to the ecosystem.

Market Failure

A situation where the allocation of goods and services is not efficient, often leading to a net social welfare loss.

Business Sector

A segment of the economy that represents the activities of businesses, corporations, and private enterprises that provide goods and services to consumers.

Deng Xiaoping

A Chinese communist leader who initiated significant economic reforms in China from the late 1970s, leading to its market economy transformation.