The Mass of Part of a Wire Is $x ( 1 + \sqrt { x } )$

question 51

Multiple Choice

The mass of part of a wire is $x ( 1 + \sqrt { x } )$ kilograms, where $x$ is measured in meters from one end of the wire. Find the linear density of the wire when $x = 36 \mathrm {~m}$ .

• A) \(6 \mathrm {~kg} / \mathrm { m }\)
• B) \(4 \mathrm {~kg} / \mathrm { m }\)
• C) \(9 \mathrm {~kg} / \mathrm { m }\)
• D) \(1.5 \mathrm {~kg} / \mathrm { m }\)
• E) None of these

---

Definitions:

Dopamine Antagonist

A type of medication or substance that blocks the action of dopamine in the brain.

Closed-head Injury

A type of traumatic brain injury where the skull remains intact but the brain is damaged, often as a result of rapid back and forth movement.

Significant

Indicates findings, results, or changes that are important, meaningful, or considerable in amount or effect.

Ischemic Stroke

A type of stroke caused by a blockage in the arteries leading to the brain, resulting in reduced blood flow and oxygen to brain tissue.