When Mechanical Work Is Done on a System, an Increase

question 21

Multiple Choice

When mechanical work is done on a system, an increase normally occurs in its

• A)internal energy.
• B)temperature.
• C)both of these
• D)neither of these

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Definitions:

Absolute Sensory Threshold

The minimum intensity of a stimulus that one can perceive, marking the boundary between detectable and undetectable levels of sensory input.

Stimulus

A change in the environment that influences or causes a response in an organism.

Minimum Intensity

The lowest level of stimulus intensity that is necessary to produce a perceptible sensation or response in the observer.

Backward Messages

A message recorded backward onto a track that is meant to be played forwards; often associated with subliminal or hidden messages in audio recordings.