Question

Eli Whitney popularized the concept of identical parts for a produced item. This is called "interchangeable parts." This made possible faster
assembly at a lower price. What else did he invent? When?

Answer 1

Answer: Interchangeable parts, popularized in America when Eli Whitney used them to assemble muskets in the first years of the 19th century, allowed relatively unskilled workers to produce large numbers of weapons quickly and at lower cost, and made repair and replacement of parts infinitely easier. Preindustrial Gunmaking

Explanation:

so yeah