Which of the following factors in the simplified Drake equation is best known?
A) Nhp, the number of habitable planets in our galaxy
B) fciv, fraction of life-bearing planets where intelligent civilizations have arisen at any time
C) fnow, fraction of civilization-bearing planets that have intelligent civilizations on them now
D) flife, fraction of life-bearing habitable planets
A
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Neptune has a single, broad ring that is extremely thin
Indicate whether the statement is true or false
The meaning of the word "energy" is immediately clear to anyone
What will be an ideal response?
Determine the equivalent capacitance of the combination shown when C = 15 mF
a.
20 mF
b.
16 mF
c.
12 mF
d.
24 mF
e.
75 mF
An absorption spectrum is also called a bright-line spectrum
Indicate whether the statement is true or false