Quarks are held together by the color force. Electrons are made of quarks
a. True
b. False
Indicate whether the statement is true or false
True
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The Drake equation calculates N. What is N?
A) the number of intelligences in the entire universe B) the number of technical civilizations in our galaxy presently C) the number of stars with habitable planets D) the number of planets with life in the universe E) the number of planets in just our galaxy
Jupiter's core is hotter than Earth's core.
Answer the following statement true (T) or false (F)
In order to produce a hologram, one needs, in addition to an object and a piece of photographic film,
A) a beam of monochromatic light and a mirror. B) a beam of coherent light and a lens. C) a beam of monochromatic light and a lens. D) a beam of coherent light and a mirror.
At the top of the distance ladder sits ________
Fill in the blank(s) with correct word