A Simple Harmonic Wave Described by the Equation Y(t)= 0

question 3

Multiple Choice

A simple harmonic wave described by the equation y(t) = 0.54 cos(3.1x - 2.3t) reflects from both ends of a string that is clamped at each end,resulting in a standing wave that is the sum of y(t) and its reflection.What is the amplitude of the standing wave at x = 0.22 m? The quantities x and y are in meters,and t is in seconds.

• A)0.84 m
• B)0.57 m
• C)0.67 m
• D)0.77 m

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Definitions:

Unconditioned Stimulus

In conditioning, a stimulus that naturally and automatically triggers a response without prior learning.

Extinction

In psychology, the gradual weakening and disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.

Neutral Stimulus

A neutral stimulus is something in the environment that initially does not elicit any intrinsic response until it is paired with an unconditioned stimulus.

Conditioned Stimulus

An initially neutral signal that, once it is linked with a natural stimulus, eventually elicits a learned response.