The Weight of Spaceman Speff,solely Due to the Gravitational Pull

question 43

Multiple Choice

The weight of spaceman Speff,solely due to the gravitational pull of planet X at its surface,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 kg?

• A)2.96 × 10²⁴ kg
• B)2.96 × 10¹⁸ kg
• C)2.96 × 10¹⁷ kg
• D)1.59 × 10¹⁸ kg

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Definitions:

Reducing Sugars

Sugars capable of acting as reducing agents, having free aldehyde or ketone groups that allow them to reduce other compounds, commonly tested by Benedict's or Fehling's solution.

Ketose

A type of monosaccharide (simple sugar) where the carbonyl group is a ketone, found in several biochemical pathways.

Aldose

A type of carbohydrate that contains an aldehyde group as its carbonyl functional group.

Glycosides

Compounds formed from a sugar and another compound by replacement of a hydroxyl group in the sugar by another group.