To What Extent Has the Arctic Ice Cap Changed in the Last

question 50

Multiple Choice

To what extent has the Arctic ice cap changed in the last 30 or so years?

• A) It has decreased by 5%.
• B) It has increased by 10%.
• C) It has decreased by 20%.
• D) It has decreased by 30%.
• E) It has not decreased.

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Definitions:

Mechanical Work

The transfer of energy from one object to another to cause movement against a force.

Full-load Torque

The torque a motor generates at its rated power and voltage to maintain its rated speed under full-load conditions.

Rated Horsepower

The official power output of an engine or motor as specified by the manufacturer, under specific conditions.

Breakdown Torque

The maximum torque that an electric motor generates at standstill without causing instantaneous failure of the motor.