A Fire Whistle Emits a Tone of 170 Hz

question 63

Multiple Choice

A fire whistle emits a tone of 170 Hz.Take the speed of sound in air to be 340 m/s.The wavelength of this sound is about:

• A)0.5 m
• B)1.0 m
• C)2.0 m
• D)3.0 m
• E)340 m

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Definitions:

Markdown

A reduction in the selling price of goods, often used as a strategy to clear inventory or stimulate sales.

Net Margin

A profitability metric calculated as net income divided by revenue, expressed as a percentage, indicating the percentage of revenue that translates into profit.

Full Selling Price

The total cost to the consumer to purchase a product or service, including any taxes, fees, or additional charges.

Return on Investment

A measure of the profitability of an investment, calculated as the net profit of the investment divided by its cost.