A 223-G Bullet Moving at 1 000 M/s Is Fired Through

question 83

Multiple Choice

A 22.3-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s.What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?

• A)0 J
• B)10.8 kJ
• C)-10.8 kJ
• D)11.2 J
• E)223 J

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Definitions:

Cerebral Cortex

The outer layer of the cerebrum composed of gray matter and consisting mainly of nerve cell bodies.

Alpha Rhythm

A pattern of smooth, regular electrical oscillations in the human brain typically occurring when a person is awake but relaxed, usually in the frequency range of 8-12 Hz.

Theta Rhythm

A pattern of brainwave activity, typically in the range of 4-8 Hz, associated with stages of sleep and meditative states.

Limbic System

In vertebrates, an action system of the brain. In humans, plays a role in emotional responses, motivation, sexual behavior, autonomic responses, and biological rhythms.