melting and refining periods, the slag and steel are poured from the furnace by tilting. The production of steel in an EAF is a batch process. Cycles, or heats, range from about. 1-1/2 to 5 hours to produce carbon steel and from 5 to 10 hours or more to produce alloy steel.
Quick Answer. The average human head weighs 10 to 11 pounds. That is about 8 percent of the weight of a human body. The average adult human brain only weighs about 3 pounds, so most of the weight in the head consists of the skull and other fluids. Continue Reading.
Chris Beckman gave a great explanation of how that is possible. I'd be a little wary of the 11 pounds estimate. For example Human head article on Wikipedia puts that figure down to 5-11 lbs. But this is quite irrelevant since in many cultures you see people (especially women) carrying great loads atop their heads either for cultural reasons.