Solve the Problem. -The Level of a Sound in Decibels (Db) Is Determined

question 117

Multiple Choice

Solve the problem.
-The level of a sound in decibels (db) is determined by the formula he formula ) db, where I db, where Iis the intensity of the sound in watts per square meter. A certain noise has an intensity of 8.49 × 10-4 watts per square
Meter. What is the sound level of this noise? (Round your answer to the nearest decibel.)

• A) 89 db
• B) 206 db
• C) 79 db
• D) 9 db

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Definitions:

Kidney Dialysis

A medical treatment for removing waste and excess water from the blood, acting as an artificial replacement for lost kidney function.

Active Transport

Use of a plasma membrane carrier protein to move a molecule or ion from a region of lower concentration to one of higher concentration; it opposes equilibrium and requires energy.

Diffusion

Movement of molecules or ions from a region of higher to lower concentration; it requires no energy and tends to lead to an equal distribution (equilibrium).

Urinary System

Organ system of humans that includes the kidneys, urinary bladder, and associated structures; excretes metabolic wastes; maintains fluid balance; helps control pH.