What provided evidence for the revolution of earth around the sun?.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring