The Escape Velocity at the Surface of Earth Is Approximately

question 28

Multiple Choice

The escape velocity at the surface of Earth is approximately 11 km/s.What is the mass, in units of M_E (the mass of the Earth) , of a planet with twice the radius of Earth for which the escape speed is twice that for Earth?

• A)2 M_E
• B)4 M_E
• C)8 M_E
• D)1/2 M_E
• E)1/4 M_E

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Definitions:

Critical Score

The value that a test statistic must exceed in order for a hypothesis to be rejected at a specified significance level.

Reliability Coefficient

A measure indicating the consistency of a set of scores obtained from repeated measurements of the same phenomenon.

Parallel Forms Reliability

A measure of reliability obtained by administering different versions of an assessment tool to the same group of individuals and correlating the results.

Internal Consistency Reliability

A measure of the extent to which all items in a test measure the same concept or construct.