Author Question: At first, the Sun's present-day rotation seems to contradict the prediction of the nebular theory ... (Read 111 times)

storky111 · **on:** Jul 27, 2018

At first, the Sun's present-day rotation seems to contradict the prediction of the nebular theory because

A) the theory predicts that the axis of rotation should not be perpendicular to the orbital plane of the planets, but it is.
B) the axis of rotation precesses slowly, which the theory does not predict.
C) the present-day rotation is in the opposite direction from that predicted by the theory.
D) the theory predicts that the Sun should have been rotating fast when it formed, but the actual rotation is fairly slow.
E) the theory predicts that the Sun should not have been rotating when it formed, but the Sun actually rotates today.

Question 2

How does Newton's Universal Law of Gravitation explain Kepler's laws?

A) Universal gravitation implies that the orbits of the planets must be elliptical (Kepler's first law).
B) Universal gravitation implies that the planets will sweep out equal areas in equal times (Kepler's second law).
C) Universal gravitation implies that the planets further from the Sun will move more slowly than the planets closer to the Sun (Kepler's third law).
D) Universal gravitation implies that when a planet is closer to the Sun in its orbit, it will move faster than when it is farther from the Sun (Kepler's second law).
E) Both C and D are correct.