Which of copernicus's ideas did galileo confirm? moons are held in rotation by gravity. the earth is the center of the solar system. the stars are burning masses. celestial bodies rotate each other?

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.

Which of the following statements about industry and production in the united states and canada is false?

How is china trying to manage flooding?