Tin mining began early in the Bronze Age, as bronze is a copper-tin alloy.in extraction and use can be dated to the beginnings of the Bronze Age around 3000 BCE, when it was observed that copper objects formed of polymetallic ores with different metal contents had different physical properties.
Quick Answer. Most semi-trailers weigh about 32,000 pounds when they are empty. Because the amount for a payload must be evenly distributed, the amount of cargo a trucker can haul is no more than 34,000 pounds if he is pulling tandem trailers. Continue Reading.
a ton is 2000 pounds 907 19 kg so does it follow that a half ton truck weighs 1000 pounds 453 5 kg actually the name doesn t refer to the weight of the truck in fact half ton pickups weigh much more than thatthe weight of a truck without cargo or passengers is called the curb weight for example many 2007 half ton pickups have curb weights between 9000 4082 3 kg and 11000 4989 5 kg pounds source edmunds ton is 2000 pounds 907 19 kg so does it follow that a half ton truck weighs 1000 pounds 453 5 kg actually the name doesn t refer to the weight of the truck in fact half ton pickups weigh much more than that the weight of a truck without cargo or passengers is called the curb weight