If a giant molecular floyd is 73 pc in diameter and a shock wave can sweep through it in 9 million years, how fast is the shock wave going in km per second? Note 1 pc = 3.1×10^13 km; 1 yr = 3.2 x 10^7 s
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If a giant molecular floyd is 73 pc in diameter and a shock wave can sweep through it in 9 million years, how fast is the shock wave going in km per second? Note 1 pc = 3.1×10^13 km; 1 yr = 3.2 x 10^7 s
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