Unit net weight Weight (mass) of goods including any packing normally going with them to a buyer in a retail sale. Net net weight
Weight (mass) of the goods themselves without any packing.
Gross Weight is the Net weight plus the tare, the tare being the mass of the container the item is contained within. Example: a package containing a steak in a supermarket freezer has a net weight of...
They don't: a dead body weighs the same as its normal weight. It seems heavier because if the person is alive, they can balance and help be more convenient to carry.
It depends on the species and condition of the corpse. Let's say it was a squirrel corpse that had its tail bitten off. That wouldn't weigh much, would it? Now let's say that an obese person died of...