Which astronomer designed scientific instruments, including a new kind of thermometer, an improved compass, and a more powerful telescope? he also discovered four moons orbiting the planet jupiter.

options-
a. galileo galilei
b. nicolaus copernicus
c. johannes kelper
d. ptolemy

He seventeenth amendment to the us constitution calls for the direct election of all us senators. this means that the people of each state get to vote to decide who will be their two us senators. before this, the legislatures of each state chose the two us senators from that state with no direct involvement of the average voter. why would this amendment be considered a reform? how would it benefit the people? even today some people claim that the seventeenth amendment was a bad idea. what arguments could be made for reverting selection of us senators back to the state legislatures?

Why did the north agree to the missouri compromise? a.) it allowed maine to enter the union as a free state. b.) it repealed the fugitive slave law. c.) it allowed california to enter the union as a free state. d.) it banned slavery in the northwest territory.

How did inovations in manufacturing lead to improvments in transportation?