A Sound Wave Radiates from a Source in All Directions

question 83

Multiple Choice

A sound wave radiates from a source in all directions.If the power of the sound source is 200 watts,then the intensity level of the sound wave 100 m from the source is (in dB)

• A) 98.5.
• B) 92.0.
• C) 91.5.
• D) 89.6.
• E) 88.3.

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Definitions:

Blood

A vital liquid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

Lymph

A clear fluid that circulates in the lymphatic system, carrying white blood cells and removing bacteria and other waste products.

Disease

A disorder or malfunction of the mind or body leading to a state of ill health, dysfunction, or decreased ability to cope with normal daily activities.

Areolar Connective Tissue

A loose connective tissue that surrounds and supports blood vessels and nerves, providing elasticity and strength.