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How does the force of gravity between the Sun and Mercury compare to the gravitational force between the Sun and the Earth? Note that the semimajor axis of Mercury's orbit is 0.4 AU, and Mercury's mass is 0.06 times the mass of the Earth.
Behavior Modification
A therapeutic approach designed to change specific undesirable behaviors using reinforcement principles.
Classical Conditioning
The method of instruction where a response is learned by associating a stimulus from the environment with one that occurs naturally.
Unconditioned Stimulus (US)
A stimulus that naturally triggers a response without any prior learning or conditioning.
Conditioned Stimulus (CS)
An initially neutral stimulus that, after being linked with an unconditioned stimulus, comes to elicit a conditioned response over time.
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