Famous numbers in Science (hard!)

Can you identify some of these famous numbers in science? Not for the faint of heart.

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Last updated: March 31, 2017

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First submitted	March 31, 2017
Times taken	159
Average score	56.3%
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Hint	Answer
300,000 km / second	Speed of light
365.2422	Days in a year
3.14159...	Pi
13.82 billion	Age of the universe
-273.15 (or -459.67)	Absolute zero
40,075 km	Circumference of the earth
1.61803...	Golden ratio
384,400 km	Distance to the moon

Hint	Answer
2.71828...	Eulers number
9.8 m / second 2	Standard gravity
343 m / second	Speed of sound
6.02 x 10 to the 23	Avogadro's number
101 kPa (or 14.7 psi)	Atmospheric pressure
4.37 light years	Distance to Alpha Centauri
125 GeV	Higgs boson
6.62607004 × 10-34 m2 kg / sec	Plank's constant