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A small 175-g ball on the end of a light string is revolving uniformly on a frictionless
surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s.
(a) What are the magnitude and direction of the acceleration of the ball?
(b) Find the tension in the string.
Difference Threshold
The minimal change in a stimulus that can just barely be detected by an organism.
Difference Threshold
The minimum difference in stimulation that a person can detect 50% of the time, also known as the "just noticeable difference" (JND).
Energy
The capacity to do work or the power derived from the utilization of physical or chemical resources.
Original Stimulus
The initial event or object that triggers a sensory or psychological response.
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