The Sun Has Existed for a Very Long Time Without

question 246

Multiple Choice

The Sun has existed for a very long time without substantial change in its appearance or behavior, so it must be in hydrostatic equilibrium. Under these conditions, which two parameters must be in balance at all points throughout the Sun's interior?

• A) magnetic field and the force of gravity
• B) force of gravity and outward gas pressure
• C) numbers of hydrogen and helium nuclei
• D) hydrogen gas pressure and helium gas pressure

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Definitions:

Elasticity

A measure in economics to show how the quantity demanded or supplied of a good or service responds to a change in price.

Price Ceiling

A legally imposed maximum price on a good or service, intended to keep prices low for buyers.

Shortage/Surplus

A market condition where the quantity demanded is greater than the quantity supplied (shortage) or the quantity supplied is greater than the quantity demanded (surplus).

Price Floor

A government or group-imposed limit that prevents prices of goods or services from falling below a certain level.