The Sound from a Single Source Can Reach Point O

question 9

Multiple Choice

The sound from a single source can reach point O by two different paths. One path is 20.0 m long and the second path is 21.0 m long. The sound destructively interferes at point O. What is the minimum frequency of the source if the speed of sound is 340 m/s?

• A) 340 Hz
• B) 6800 Hz
• C) 520 Hz
• D) 680 Hz
• E) 170 Hz

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Definitions:

Autarky

An economic system wherein a country or entity is self-sufficient and does not engage in international trade.

Producer Surplus

The difference between what producers are willing to accept for a good or service and the actual price they receive, representing the benefit to producers.

Total Surplus

The total net gain to consumers and producers from trading in a market; the sum of the producer surplus and the consumer surplus.

Consumer Surplus

The difference between the total amount that consumers are willing and able to pay for a good or service and the total amount that they actually pay.