pyhsiclover

what is the critical density in # atoms of hydrogen per cubic meter?

PLEASE GIVE THE ANSWER,I ALREADY INPUT TO YOUR FORMULA AND IT IS FALSE... Is your answer 0.57? A 15 kg, 1m wide door which has frictionless hinges is closed but unlocked. A 400 g ball hits the exact middle of the door at a velocity of 35 m/s and bounces o...

Thank you :) but if u don't mind,can u explain it?

wrong.....i answer 0.5722 too? @- Count Iblis do you know the answer?