Assuming That the Wave Speed Varies Little When Sound Waves

question 77

Multiple Choice

Assuming that the wave speed varies little when sound waves are traveling though a material that suddenly changes density by 8%,what percentage of the incident wave intensity is reflected?

• A) < 1%
• B) 7%
• C) 8%
• D) 20%
• E) ​25%

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Definitions:

Subsidiary

A company controlled by another company, often referred to as the parent company.

Dividend

A payment made by a corporation to its shareholders, usually as a distribution of profits.

Non-controlling Interest

A stake in a company that is less than 50%, implying that the holder does not have control over the company's operations.

Equity

The value of an ownership interest in a company, calculated as company assets minus its liabilities and representing the net assets owned by shareholders.