Fermi Questions Memorization
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155 Terms
Radius of Earth (m)
6.5e6
Volume of Earth (m³)
1e21
Surface Area of Earth (m²)
5e14
Radius of Sun (m)
7e8
Volume of Sun (m³)
1.4e27
Mass of Earth (kg)
6e24
Mass of Sun (kg)
2e30
Distance from Moon to Earth
240K mi, 3.84e8 m
Distance from Sun to Earth
93M mi, 1.5e11 m
Distance from Earth to Jupiter
500M mi
Distance from Earth to Venus
50M mi
Average Depth of Ocean
4 km
Deepest Point in the Ocean
11 km
Average Height of Earth’s Crust
1 km
Highest Point on Earth
10 km
Gravitational Constant
6.67e-11
Amount of Land on Earth
1e14 m²
Amount of Ocean on Earth
1.335e18 m³
Jupiter Diameter
10*Earth
Jupiter Volume
1000*Earth
Sun Diameter
10*Jupiter, 100*Earth
Amount of Google Searches per Day
1e10
Amount of Google Users
4.3e9
Small Coin - mass, diameter, width
2 g, 2 cm, 1.5 mm
Big Coin - mass, diameter, width
5 g, 2 cm, 2mm
Total Birds in the US
10B
Total Bird Species in the US
800
Total Birds in the World
50B
Total Bird Species in the World
11K
Birds/Person
5
Total Fish in the US
150M
Fish Species in North America
800
Total Fish in the World
3.5T
Total Fish Species in the World
10K
Total Mammal Species in the US
400
Total Mammal Species in the World
5400
Number of Sci Oly Teams
6000
Students per Team in Sci Oly
15
Number of Events in Sci Oly
23
Primes below 100
25
Primes below 1000
150
Primes below 10K
1000
Primes below 100K
10K
Primes below 1M
75K
Primes below 10M
500K
Primes below 100M
5M
Primes below 1B
50M
Formula for calculating primes
0.434x/log(x)
US GDP
23T
US Debt
35T
Average Income
40K
China GDP
14T
India GDP
3.2T
World GDP
100T
Speed of Light
3e8 m/s
Wavelength of Visible Light
400-700 nm
Speed of Sound
343 m/s
Mass of a Proton
1.6e-27 kg
Radius of a Proton
1e-15 m
Mass of an Electron
1e-30 kg
Radius of an Electron
2e-15 m
Mass of H atom
1.7e-27
Radius of H atom
5.3e-11
Average Molar Mass of Air
30 g/mol
Average Molar Mass of Human
55 g/mol
Distance to Alpha Centauri
4.37e16 m
Radius of Solar System
4.5e12 m
Radius of Milky Way
5e20 m
Distance to Sirius
1e17 m
Distance to Proxima Centauri
4e16 m
Distance to Barnard’s Star
6e16 m
Roulette
1/37 per number, ½ per color
Factorial Formula
e^(nlogn - 0.434n)
Number of Digits in Exponent a^b
blog(a)
log(2)
0.301
log(3)
0.477
log(4)
0.602
log(5)
0.698
log(6)
0.778
log(7)
0.845
log(8)
0.903
log(9)
0.954
log(e)
0.434
Fibonacci Sequence
0.209n-0.35
Tweets/day
500M
Instagram Users
2B
Twitter Users
330M
Facebook Users
2.9B
Facebook Likes/min
4M
LinkedIn Users
800M
LinkedIn Users (US)
180M
TikTok Users
1B
TikTok Users (US)
100M
Snapchat Users
600M
Baseball Diamond - Each Side
90 ft
Baseball Diamond - Center Field
400 fr
Stadium Capacity
50K
Football Field
90m*50m
Soccer Field
100m*60m