What was benjamin franklin best known for as a scientist?

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

What was the effect of the industrial revolution on the working class?

Once a constitutional amendment has been proposed, to which of the selections below is it generally passed for formal ratification? a. state legislatures b. state governors c. president d. congress