Why is the distribution of the globulars significant?
A: It helps in determining the distances to the globulars
B: It helps to show that the Sun is at the center of the Milky Way
C: Spherical symmetry indicates the position of the Milky Way center
D: It helps us understand more about variable stars
E: It really isn't significant- they are randomly distributed throughout the whole Milky Way
Ans: C: Spherical symmetry indicates the position of the Milky Way center
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A Carnot engine
A. consists of zero heat flow and constant pressure processes. B. consists of only processes which do not involve heat flow. C. consists of only isothermal processes. D. absorbs heat at a single high temperature and rejects heat at a single low temperature. E. consists of constant temperature and constant volume processes.
Does Hubble's law work well for galaxies in the Local Group? Why or why not?
A) Yes, it works so well that we have never detected any measurable deviations from its predictions. B) No, because galaxies in the Local Group are gravitationally bound together. C) No, because we do not know the precise value of Hubble's constant. D) No, because Hubble did not know the Local Group existed when he discovered his law.
An amount of water forms a single hexagonally symmetric snowflake. Elsewhere the same amount of water is a droplet of liquid water. Which state has higher entropy?
A. The solid water, since it has a tight restriction to hexagonal symmetry B. The droplet of liquid water, since it is more unruly and can adopt almost any shape C. Their entropy levels are the same, since they are actually the same amount of H2O, just different phases
The most massive main-sequence stars are the M stars
Indicate whether the statement is true or false