wow... just wow... so if a man weighs 150lbs and i cut his head off and stick it up his ass and weigh him again, he will weigh 4 times more? Come on menace, are you serious? your being sarcastic in some way right? Did you tie a knot right in the middle of the bag so it kinda looks like a bowtie then placed the knot in the middle of the weighing surface?
so I ask you which is heavier? ton of feathers or ton of lead?
I also agree with darkepiphany 100%, you are not making a chemical or neither a physical reaction to make the bag gain or lose any weight.
Chemical reaction as in burining/melting
physical as in cutting.
If you tie a knot on the top of the bag so it kinda looks like a resin head with stem,then the bag would be top heavy because of the knot BUT, the entire mass of the object is the same.
Go to a digital weighing scale at a grocery store and try it.