When a Sound Wave Moves Through a Medium Such as Air,the

question 61

Multiple Choice

When a sound wave moves through a medium such as air,the motion of the molecules of the medium is in what direction (with respect to the motion of the sound wave) ?

• A)perpendicular
• B)parallel
• C)anti-parallel (in opposite direction)
• D)Both choices b and c are valid.

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Definitions:

Equilibrium Level

The point at which market supply equals market demand, leading to a stable situation where there is neither excess demand nor excess supply.

Equilibrium Price

The price at which the quantity of a good or service supplied is equal to the quantity demanded, resulting in no net surplus or shortage in the market.

Natural Gas

A fossil fuel used as a source of energy for heating, cooking, and electricity generation, consisting primarily of methane.

Supply And Demand

The fundamental economic model that explains the interaction between the quantity of a good or service that producers wish to sell and the quantity that consumers wish to buy.