A Toy Steam Engine Has a Mass of 1

question 79

Multiple Choice

A toy steam engine has a mass of 1.00 kg. The toy starts from rest and reaches a velocity of 4.00 m/s in a time of 3.00 seconds while covering a distance of 4.50 meters. During that time the toy takes in 30 J of heat. What is the change in the internal energy of the toy?

• A) −52.0 J
• B) +52.0 J
• C) −22 J
• D) +22 J

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Definitions:

Reflex Arc

The neural pathway that mediates a reflex action involving sensory nerves, a central nervous system integration center, and motor nerves.

Nervous System

An extensive network of specialized cells and tissues responsible for controlling and coordinating body activities by transmitting electrical and chemical signals throughout the body.

Meninx

A term related to the meninges, which are the three layers of protective tissue surrounding the brain and spinal cord.

Withdrawal Reflex

An involuntary reaction to a painful or harmful stimulus that results in the quick retraction of the body part exposed to the danger, providing a protective mechanism.