The Crab Pulsar Rotates 30 Times Per Second

question 22

Multiple Choice

The Crab Pulsar rotates 30 times per second. However, its period is increasing by about s per year. How many years will it take before its period of rotation has doubled?

• A) 3.0  10⁶ yr
• B) 6.7  10³ yr
• C) 3.3  10³ yr
• D) 1.05  10¹⁰ yr
• E) 2.10  10¹⁰ yr

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Definitions:

Balance of Trade

The difference between the value of our imports and our exports.

Trade Problem

Issues or challenges that arise in the process of exchange of goods, services, or both between countries.

High Protective Tariffs

Elevated taxes imposed on imported goods to protect domestic industries from foreign competition.

Frederic Bastiat

A French economist and writer known for his theories on free markets and the unseen economic consequences of government intervention.