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Astronomy Quote Quiz: Numbers Game

Question # 20 (June 7 - August 22, 2006)

Q: Sound waves travel at a speed of about 1100 feet per second in Earth's atmosphere, which has a temperature of about 20 degrees Celsius. What is the speed of sound in the 2 million-degree Celsius gas of the supernova remnant IC 443?
1100 feet/sec bar22.1% 34
a.60 feet/sec bar16.9% 26
600,000 feet/sec bar29.9% 46
110,000,000 feet/sec bar31.2% 48

Total Votes: 154

Answer: c. 600,000 feet/sec


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