(30 POINTS!) The heliocentric theory explains that planets orbit the Sun at the center of our solar system. It replaced the geocentric theory, which suggested that all objects in space orbit Earth. Which evidence could have helped disprove the geocentric theory and lead to development of heliocentric theory? A. Objects in sky, including Sun, appear to revolve around Earth on a daily cycle. B. The planet Earth appears to be a stationary point in space. C. The moons of Jupiter are observed revolving around Jupiter. D. Earth's moon appears larger in the sky than the Sun. Which to ratio

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.