How did Galileo study motion and learn how objects move in time and space?

A prominent feature of the vocal part in the music is

A. the use of vocables and yodeling. B. the sounding of two versions of a melody at the same time. C. the sound of a solo voice alternating with a drum chorus. D. the sound of the call of a leader answered by a group.

Why was the invention of oil painting considered important to painters in the Renaissance?

a)  Its versatility allowed artists to work more slowly and make changes. b)  It did not change color over time. c)  It introduced a way to create large paintings for public display. d)  Its quick drying time made it more efficient.