The Astronauts Feel Weightless in the International Space Station, Which

question 5

Multiple Choice

The astronauts feel weightless in the International Space Station, which orbits the Earth once every 90 minutes. Why?

• A)because there is no gravity in space
• B)because they and the space station are both falling around the Earth
• C)because the gravity from the Moon cancels out the gravity from Earth
• D)because they are moving so fast

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Definitions:

Unit Elasticity

A situation in which the percentage change in quantity demanded or supplied is equal to the percentage change in price.

Total-revenue Curve

A graphical representation showing how the total revenue of a firm changes as the quantity sold of its product varies.

Linear Demand Curve

A graphical representation of the relationship between the price of a good and the quantity demanded, characterized by a straight line.

Unit Elastic

A situation where a change in price leads to an equivalent proportional change in quantity demanded or supplied.