The Weight of Spaceman Speff at the Surface of Planet

question 19

Multiple Choice

The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 10⁴ km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg? (G = 6.67 × 10^-11 N ∙ m²/kg²)

• A)2.99 × 10²⁴ kg
• B)2.99 × 10¹⁸ kg
• C)2.99 × 10¹⁷ kg
• D)1.59 × 10¹⁸ kg

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Definitions:

Sampling

The process of selecting a subset of individuals, objects, or observations from a larger population for the purpose of making inferences about the population.

Telephone Sampling Frames

A list or database of telephone numbers from which a sample is drawn for the purpose of conducting research via phone calls.

Landline

A phone that is connected to the phone system via physical telephone wires.

Sample Size

The number of individuals or observations included in a sample for the purposes of research.