A Piece of Taffy Slams into and Sticks to Another

question 72

Multiple Choice

A piece of taffy slams into and sticks to another identical piece of taffy that is at rest. The momentum of the two pieces stuck together after the collision is the same as it was before the collision, but this is not true of the kinetic energy, which is partly turned into heat. What percentage of the kinetic energy is turned into heat?

• A) 75%
• B) 0%
• C) 25%
• D) 50%
• E) not enough information given

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Definitions:

Optimal Level

The most favorable or efficient level of functioning, performance, or operation.

Drive Theory

A theory suggesting that behavior is motivated by the need to reduce internal tension caused by unmet biological needs.

Alertness

The state of being vigilant and ready to respond quickly to potential dangers or problems.

Homeostasis

The self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.