A 1000-Kg Space Probe Is Motionless in Space

question 57

Multiple Choice

A 1000-kg space probe is motionless in space.To start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s.At the end of this process it is moving at 20 m/s.The approximate mass of the ejected gas is:

• A)0.8 kg
• B)4 kg
• C)5 kg
• D)20 kg
• E)25 kg

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Definitions:

Western Coast

The land along the western edge of a continent that borders an ocean or sea.

Eastern Coast

Refers to the eastern seaboard or boundary of a continent or country, facing an ocean or sea.

Air Masses

Large volumes of air defined by their temperature and humidity characteristics, forming the basis of weather patterns.

Equator

The Equator is an imaginary line around the Earth's surface located equidistant from the North and South Poles, dividing the Earth into the Northern and Southern Hemispheres.