What is a firefighters attack hose line?
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Your best bets are SALT or BAKING SODA (sodium bicarbonate). Both are non-flammable and will put out the fire by smothering it. Do not use water, especially if there is oil involved in the fire. The water will just make it spread more. Do not use flour. Flour dust is very flammable and can cause a dust explosion. I'm not sure what you're talking about for the extinguisher, but usually when you pull the ring out, it's usually a safety bit that breaks so that you can use it. Aim the extinguisher at the BASE of the fire.
locking yr knee is not bad, thats what yr supposed 2 do! its kinda hard 2 explain but say if u were standing in first position, yea yr legs r straight but if u can move this muscle in yr knee yr knee caps appear 2 move up, yr legs become even closer together, and they appear even straighter! u no that feeling u get in yr foot and ankle when yr pointing as hard as u can and u know yr foot can't point any harder? well thats how yr knee feels when yr locking it. as long as yr leg isn't bent you'll do fine! just try not 2 worry about it, if yr legs look like the other ballerinas and yr teacher dosn't say anything about it then yr doing absolutly nothing wrong. good luck w/ ballet and never quit! 14 nots 2 old, don't worry