How long did the battle of lexington and concord last?

What were the main features of the aristotelian-ptolemaic model of the cosmos

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.

Astorage company rents square storage units by the area of the unit. which graph shows the relationship between the area (x) of a storage unit and the length of its side (y)?