How was iron changed to steel ?

Heated and left to melt then harden again

Explanation:

Or it was smashed I think d 1st 1

Iron is changed into steel by blowing oxygen through the molten metal from the Blast Furnace. This oxidises the impurities in the molten metal. Carbon is a major impurity in Blast Furnace metal. Explain how blowing oxygen through the molten metal helps to remove the carbon.

americans had many intangible advantages. well since the british fought a war far from home military orders, troops, and supplies sometimes took months to reach their destinations, and the british had an extremely difficult objective. they had to persuade the americans to give up their claims of independence, americans had a grand cause: fighting for their rights, their independence and their liberty. this cause is much more just than waging a war to deny independence.

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.