Hey guys, in an article it states: Why is this true? What other info can I obtain from this/what info is missing/what is (in)accurate? From what I can think of myself. The reason of why this would happen is that since helium is lighter, the force the helium particles are exerting on the football are much less of that of air therefore you will need to pump more helium into the football to recieve that same amount of pressure that is required. Am I correct on this statement? Also would the helium even be able to help keep the football in the air for a longer period of time as apposed to a football filled with air? I mean the skin of the football is still pretty heavy, so would the helium be able to lift the football and counter the force of gravity on the ball even for a short period of time? Any input would be appreciated. Thanks!