A 50-Cm³ Block of Wood Is Floating on Water,and a 50-Cm³

question 16

Multiple Choice

A 50-cm³ block of wood is floating on water,and a 50-cm³ chunk of iron is totally submerged in the water.Which one has the greater buoyant force on it?

• A)the wood
• B)the iron
• C)Both have the same buoyant force.
• D)It cannot be determined without knowing their densities.

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Definitions:

Positive Reinforcement

A process in behavior analysis where the probability of a behavior occurring is increased by following it with the addition of a reinforcing stimulus.

Negative Reinforcement

A behavior modification technique that involves the removal of an unpleasant stimulus to increase the likelihood of a desired response.

Learned Helplessness

A condition in which a person suffers from a sense of powerlessness, arising from a traumatic event or persistent failure to succeed. It is thought to be one of the underlying causes of depression.

Biofeedback

A technique that teaches individuals to control bodily processes that are normally involuntary, such as heart rate, through the use of electronic or other instruments.