The Big Bang predicts that one in four atoms in the universe is helium
Indicate whether the statement is true or false
FALSE
Physics & Space Science
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The close-packed planes in a FCC metal are the ______________ family of planes.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
A light-year is a unit of _____
A) time B) luminosity C) distance D) mass
Physics & Space Science
If a star was the same size as our Sun, but was 81 times more luminous, it must be
A) twice as hot as our Sun. B) three times hotter than the Sun. C) four times hotter than the Sun. D) nine times hotter than the Sun. E) 81 times hotter than the Sun.
Physics & Space Science
The first experiment, which systematically demonstrated the equivalence of mechanical energy and heat, was performed by
a. Joule. b. Boltzmann. c. Thompson, Count Rumford. d. Kelvin.
Physics & Space Science