A Certain Factory Whistle Can Be Heard Up to a Distance

question 55

Multiple Choice

A certain factory whistle can be heard up to a distance of 2.5 km.Assuming that the acoustic output of the whistle is uniform in all directions,how much acoustic power is emitted by the whistle? The threshold of human hearing is 1.0 × 10^-12 W/m².

• A)0.079 mW
• B)0.026 mW
• C)0.26 mW
• D)0.79 mW
• E)2.6 mW

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Definitions:

Sensate Focus

A set of specific sexual exercises for couples or individuals designed to build intimacy and understanding by focusing on touch and sensation.

Sexual Dysfunction

Impairments in sexual functioning that cause subjective distress.

Safer Sex

The set of practices designed to reduce the risk of transmitting or acquiring sexually transmitted infections and unwanted pregnancies.

Anal Intercourse

A form of sexual activity that involves the insertion of the penis into the anus of a sexual partner.