The Copernican System Was No More Accurate Than the Ptolemaic

question 54

Multiple Choice

The Copernican system was no more accurate than the Ptolemaic system in predicting the positions of the planets because

• A) the Copernican system used the old value for the radius of Earth.
• B) Copernicus had been unable to detect parallax.
• C) the Copernican system used uniform circular motion like Ptolemy.
• D) in the Copernican system only Mercury and Venus orbit the sun,all other planets orbited Earth.
• E) Copernicus used inaccurate data from Ptolemy's system.

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Definitions:

Monopolist's Profits

The excess earnings a monopolist achieves by setting the price above marginal cost due to lack of competition.

Market Power

The ability of a company or sector to control or influence the market price of its products or services.

Elasticity of Demand

indicates how responsive the quantity demanded of a good is to a change in its price; a restated measure of price sensitivity.

Profit-Maximizing Monopolist

A monopoly that adjusts its production and pricing strategies to achieve the highest possible profit.