Choose the One Alternative That Best Completes the Statement or Answers

question 178

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-Use the formula $\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)$ , where the loudness of a sound in decibels is determined by $\mathrm { S }$ , the number of watt $/ \mathrm { m } ^ { 2 }$ produced by the soundwave, and $\mathrm { S } _ { 0 } = 1.00 \times 10 ^ { - 12 }$ watt $/ \mathrm { m } ^ { 2 }$ . A certain noise produces $8.34 \times 10 ^ { - 5 } \mathrm { watt } / \mathrm { m } ^ { 2 }$ of power. What is the decibel level of this noise? (Round to the nearest unit.)

• A) 69 decibels
• B) 79 decibels
• C) 182 decibels
• D) 8 decibels

---

Definitions:

Squamous

Referring to flat, scale-like cells that make up the outer layer of the skin and some internal organs.

Actin

Actin is a globular protein that forms filaments, playing a vital role in muscle contraction, cell movement, and the maintenance of cell shape in all eukaryotic cells.

Myosin

A type of motor protein found in muscle tissue that is involved in muscle contraction and movement by interacting with actin.

Synapses

The junctions between neurons through which electrical or chemical signals are transmitted.