How did Harlow Shapley conclude that the Sun was not in the center of the Milky Way Galaxy?
A) by looking at the shape of the "milky band" across the sky
B) by mapping the distribution of stars in the galaxy
C) by mapping the distribution of globular clusters in the galaxy
D) by mapping the distribution of gas clouds in the spiral arms
E) by looking at other nearby spiral galaxies
C) by mapping the distribution of globular clusters in the galaxy
You might also like to view...
The force needed to make an object move in a circle is
a. centripetal force b. weight c. kinetic friction d. static friction e. none of the above
What is the rms current for an 8.0 ?F capacitor attached to a 120 V rms 60 Hz source?
A. 2.8 A B. 1.4 A C. 0.72 A D. 0.36 A E. 0.18 A
What is thought to have caused the craters on Venus?
A) Most are volcanic in origin; some are due to meteoritic impacts. B) As in the case of Mercury, all the craters are due to meteorite impacts. C) Because meteorites cannot survive passing through the atmosphere of Venus, all craters must be volcanic. D) Venus has very few craters and their origin is not known. E) Venus' craters originated during differentiation.
What is Newton's Third law of motion?
A. When two bodies interact, they create equal and opposite forces on each other. B. Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. C. Force equals mass times acceleration, F = ma. D. A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it.