A Sound Source Radiates Sound Uniformly in All Directions $\times$ 10^-4 W/m²

question 36

Multiple Choice

A sound source radiates sound uniformly in all directions.The intensity of the sound at a distance of 100 m is 1.00 $\times$ 10^-4 W/m².The power of the sound source is

• A) 12.6 W.
• B) 16.2 W.
• C) 20.4 W.
• D) 24.5 W.
• E) 30.6 W.

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Definitions:

Presynaptic Terminal

The end of a neuron from which neurotransmitters are released to communicate with another neuron at a synapse.

Action Potential

An action potential is a rapid and temporary electrical charge that travels along the membrane of a neuron, enabling the transmission of signals.

Calcium Ions

Essential ions within the body that play key roles in blood clotting, muscle contraction, and nerve function.

Voltage-Gated Ion Channels

Protein channels in cell membranes that open or close in response to changes in electrical membrane potential, facilitating the flow of ions.