If a galaxy has a radial velocity of 8000 km/sec and the Hubble constant is 70 km/sec/Mpc, what is the distance to this galaxy?
a. 8.75 x 103 Mpc
b. 2.4 x 109 Mpc
c. 5.6 x 105 Mpc
d. 114 Mpc
e. 8.75 x 10-3 Mpc
D
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Earth is located about ____________ of the way out from the center of the Milky Way Galaxy
a. 1/2 b. 1/3 c. 2/3 d. 3/2
Why do the patterns of the stars in our sky look the same from year to year?
A) because the stars in the constellations move so slowly-typically about the speed of a snail-that their motions are not noticeable B) because the stars in the constellations are so far away C) because the stars in the constellations are not moving D) because the stars in the constellations all move at the same speeds and in the same directions, so they don't change their relative positions
_____ says that energy must flow from hot regions to cooler regions either by conduction, convection, or radiation
A) The law of energy transport B) The law of conservation of energy C) The theory of energy equilibrium D) The theory of special relativity
The energy emitted by the Sun comes from chemical reactions
a. True b. False Indicate whether the statement is true or false