requires a very high temperature to melt
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Antibiotics were developed in the 1920s and later commercialized in the 1940s.
No, at one point it was used as an emetic, but it was later discovered that copper sulphate is quite toxic to humans.
It depends on the dates Cents dated 1981 and earlier weigh 3.11 gm and are 95% copper. Cents dated 1983 and later weigh 2.5 gm and are 2.5% copper. Grab your calculator.
It's generally believed that early humans, including cavemen, did not have access to metal tools or weapons. They primarily relied on natural materials such as stone, bone, and wood for their tools and weapons. The use of metal tools and weapons emerged later in human history during the Bronze Age.
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Iron needs to be heated to a much higher temperature to find and mold
Iron and Brass foundry. Later developed into Revere copper company
most of there sheilds were made of copper. later on they found steel and iron by the Assyrians and used that for shield and weapons.
Metal workers made tools and weapons from copper and later bronzeBronze: a mixture of copper, tin, and sometimes other metals like zinc. Bronze tools and weapons were stronger than copper ones. Most of the time they sold the bronze tools which helped other groups win battles.
cross bowsswordsgunsbombsnuclear weapons
This would be the Chinese hand cannons that they developed during the late middle ages for fireworks purposes later changed to weapons of war.
because they did
Early Roman helmets were made of brass, a malleable alloy of copper and zinc. Later helmets were made of bronze, a very strong, hard alloy of copper and tin. Still later some helmets were made of iron, which is not as strong as bronze but was easier to find. The Romans worked some of their iron with carbon, but they are not thought to have developed true steel.
Some solutions to address urbanization in least developed countries include implementing affordable and sustainable housing solutions, improving infrastructure such as transportation systems and utilities, promoting inclusive urban planning that involves local communities, and investing in education and job creation to reduce rural to urban migration pressures. Additionally, supporting small businesses and entrepreneurship in urban areas can help create economic opportunities and reduce poverty.
Antibiotics were developed in the 1920s and later commercialized in the 1940s.
1983 and later - copper plated zinc. Some 1982 coins were all copper and some copper plated zinc.