By Studying the Orbit of a Moon Around Its Parent

question 16

Multiple Choice

By studying the orbit of a moon around its parent planet, astronomers can use ________ to find the parent planet's ________.

• A) escape velocity; rotation rate
• B) the moon's eccentricity; Roche limit
• C) small perturbations; magnetic field strength
• D) the moon's velocity; radius
• E) Newton's version of Kepler's third law; mass

---

Definitions:

Null Hypothesis

A default hypothesis that there is no significant difference or effect, tested against the alternative hypothesis.

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis; it depends on the chosen level of significance.

Test Statistic

A standardized value used in hypothesis testing to determine how far a sample statistic diverges from what is assumed in the null hypothesis.

Sample Evidence

Data collected from a sample that is used to make inferences or conclusions about a larger population.