A Future News Release Might Report That a New Planet

question 27

Multiple Choice

A future news release might report that a new planet has been found around a star very similar to our sun. This newly discovered planet is claimed to have a mass 40 times that of Earth and is located nearly 25 AU from the star it orbits. Which of the following would be a reasonable prediction about this planet?
I. The planet will probably have a mean density of around 5 g/cm 3 .
II. The planet will probably have a radius of around five to ten times greater than Earth s.
III. The planet will probably have several satellites.
IV. The planet will probably have a composition that is mostly hydrogen and helium.

• A) I, IV
• B) I, II, III
• C) II, III, IV
• D) I, II, IV
• E) I, II, III, IV

Distinguish between elastic, inelastic, and unitary elasticity of demand.

Identify factors that affect the elasticity of demand for goods and services.

Understand how the time period affects the elasticity of demand.

Comprehend the effects of market definitions and availability of substitutes on demand elasticity.