Multiple star systems in our galaxy
A) are extremely rare, making up less than 1% of the total
B) are very common, making up about 50% of the total
C) are fairly common, making up around 30% of the total
D) do not exist
B
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Four equal resistors connected in series have same current and same voltage across each resistor
Indicate whether the statement is true or false
Which statement illustrates the fact that two different theories can both agree with the same set of observations?
A) Nonsense--it is impossible for two different theories to both be correct. B) the theories of Ptolemy and Copernicus, before Tycho made his observations C) the theories of Copernicus and Kepler, after Tycho made his observations D) the theories of Galileo and Kepler E) the Earth-centered circular orbit theory of the early Greeks, and the later theory of Ptolemy
What was the purpose of the IAU establishing 88 official constellations?
a. To allow ancient stories of each constellation to be preserved b. To name all constellations the same across any culture c. To identify which constellation was created by which culture d. To define boundaries for constellations including every part of the sky e. To include additional, fainter stars within a constellation
Because it can support huge Olympus Mons, and does not show tectonics on the scale of Earth, we conclude the crust of Mars must be ________ than ours
Fill in the blank(s) with correct word