Why doesn’t the flame from a propane torch travel back to the can and blow it up?

Question

I’ve always been a little embarrassed to ask, but when I have, say, a propane torch, how come the flame doesn’t go back through the line and blow up the can?

In: Engineering

Answer 1

Another fun one – if you light a candle and blast oxygen at it what will happen?

Answer – it will blow the candle out. Not enough fuel in the right form vs the strong wind of oxygen blowing it out.