A Barking Dog Delivers About 1

question 332

Multiple Choice

A barking dog delivers about 1.0 mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level in decibels at a distance 5.00 m from the dog? The threshold of human hearing is

• A) 68 dB
• B) 61 dB
• C) 63 dB
• D) 65 dB

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Definitions:

Melting Alloy

A type of thermal overload relay element that melts or deforms with excessive current, providing protection by breaking the circuit.

Ratchet Wheel

A ratchet wheel is a mechanical component consisting of a wheel or gear with teeth, designed to allow movement in one direction while preventing backward motion.

Solid

A state of matter characterized by structural rigidity and resistance to changes of shape or volume.

Overload Protection

A safety mechanism designed to automatically interrupt the power supply when the electrical load exceeds the system's capacity, preventing damage or fire.