When Viewed from Earth, Venus Subtends an Angle of About

question 107

Multiple Choice

When viewed from Earth, Venus subtends an angle of about 1 arcminute (1/60°) when it is at the closest point to Earth in its orbit. If we are watching Venus set in the west over a clear horizon (e.g., ocean) , how long would Venus take from the time it first reached the horizon to completely disappear below the horizon?

• A) almost instantaneous (much less than 1 second)
• B) 1 second
• C) about 4 minutes
• D) about 4 seconds

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Definitions:

Compound

A substance made up of two or more elements chemically bonded together, characterized by having properties distinct from its component elements.

DRO

Differential Reinforcement of Other behavior, a technique used in behavior therapy where reinforcement is given for any response other than a targeted undesired behavior.

Contingency Reinforcement Schedule

A plan or method in operant conditioning by which a certain behavior is reinforced based on meeting specific conditions or criteria.

Differential Reinforcement Schedule

A schedule of reinforcement in which a specific number of behaviors must occur within a specified time in order for reinforcement to occur