Famous numbers in Science (hard!)

Can you identify some of these famous numbers in science? Not for the faint of heart.
Quiz by downtown1979j
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Last updated: March 31, 2017
First submittedMarch 31, 2017
Times taken115
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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
+1
Level 71
Mar 31, 2017
Nice work.
+2
Level 23
Jun 15, 2017
Spelled 'Planck' after Max Planck.
+1
Level 48
Jan 21, 2021
Could do with some more flexibility in the answers but otherwise a good quiz