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.
Quick Answer. The gross weight of half-ton trucks varies by manufacturer and model. The term half-ton refers to the cargo carrying capacity in the bed and cab of the truck. A half-ton pickup truck can carry at least 1,000 pounds of cargo, not including towing capacity. Continue Reading.