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