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

---

Definitions:

Resonance Structures

Representations of a molecule where the chemical connectivity is the same but the electrons are distributed differently around the structure.

Cyclic

Pertaining to chemical compounds that contain a ring structure within their molecules.

Lewis Structure

A diagrammatic method for representing the valence electrons of atoms within a molecule, indicating bonds between them.

Ozone

A molecule made of three oxygen atoms, O3, forming a layer in the Earth's stratosphere that protects life by absorbing most of the sun's harmful ultraviolet radiation.