The proper abbreviation for ‘seconds' is ‘sec.'
a. True
b. False
Indicate whether the statement is true or false
False
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Given how many times intelligent civilizations could have appeared over the universe's history, it is most likely that if other civilizations exist, they will
A) be slightly less advanced than us B) be much less advanced than us C) have about the same level of technology as us D) be much more advanced than us
Neutron stars are the size of ________
Fill in the blank(s) with correct word
A little known fact is that both Robinson Crusoe and Friday wore eyeglasses. As it so happens, Robinson Crusoe was farsighted while Friday was nearsighted
Whose eyeglasses did they use whenever they wanted to start a fire by focusing the sun's rays? A) Robinson Crusoe's B) Friday's C) Both would work equally well. D) Both actually worked, but Friday's was a little bit better. E) Neither's worked, but fortunately they were in possession of matches.
We can determine proportions of body fat because:
a. body fat is denser than muscle. b. body fat is less dense than muscle. c. muscle is less dense than water. d. body fat has the same density as water. e. body fat and muscle are both less dense than water.