According to What We Now Know from Newton's Laws, Which

question 15

Multiple Choice

According to what we now know from Newton's laws, which of the following best explains why Kepler's second law is true?

• A)A planet's total orbital energy must be conserved as it moves around its orbit.
• B)Gravity is an inverse cube law.
• C)This effect happens because of the influence of other planets on a particular planet's orbit.
• D)Orbits must be elliptical in shape.

---

Definitions:

Discouraged Workers

Individuals not actively seeking employment because they believe no jobs are available for them.

Labor Force

The sum of individuals either working or actively looking for work in an economic system.

Unemployment Figures

The statistics that represent the percentage of the labor force that is not employed but actively seeking employment.

Aggregate Demand

The sum of needs for all goods and services in an economy, measured at a collective price level within a set time interval.