Fermi Questions Flashcards

7,500

How many steps does a average moderately active person take per day?

10^9

How many steps does a average moderately active person take in a lifetime?

10^5

How many minutes are in a year?

10^7

How many seconds are in a year?

10²

How tall is the Eiffel Tower (ft)?

10^11

What is the volume of the Earth (mi)?

10^4

What is the circumference of the Earth (mi)?

10^0 - 10^1

What is the size of a blueberry (mm)?

10^4 - 10^5

How many hairs are on an average human head?

10^12

one light year (mi)

10^0

one parsec (ly)

10²

one furlong (yd)

2.54 cm

one inch

30.48 cm

one foot

1.6 km

one mile

1760 yd

one mile

5280 ft

one mile

63360 in

one mile

1.15078 mi

one nautical mile

22 square ft

How much skin does the average human have?

15 ft

How long is the average human’s intestine?

3.2^12

How many cells are in the human body?

145 JPY

one USD

0.80 GBP

one USD

1.35 CAD

one USD

5.39 × 10^-44 s

Planck Time

10^-30 s

Quectosecond

10^-27 s

Rontosecond

10^-24 s

Yoctosecond

3 × 10^-24 s

Jiffy (the amount of time it takes to travel one fermi)

10^-21 s

Zeptosecond

10^-18 s

Attosecond

10^-15 s

Fermtosecond

10^-13 s

Svedberg

10^-12 s

Picosecond

10^-9 s

Nanosecond

10^-8 s

Shake

10^-6 s

Microsecond

10^-3

Millisecond

approximately 10^-3 s

Jiffy (electronics)

10^-2 s

Centisecond

10^-1 s

Decisecond

10 s

Decasecond

100 s

Hectosecond

1/1000 d

Milliday

1/40 solar hour (90 s on average)

Moment

10^6 s

Megasecond

2 wk

Fortnight

27 d 4 hr 48 min - 29 d 12 hr

Lunar Month

40 d

Quarantine

354.37 d

Lunar Year

4 yr

Olympiad

5 yr

Lustrum

15 yr

Indiction

20 yr

Score

10^9 s

Giggasecond

50 yr

Jubilee

2148 2/3 yr

Age

10^12 s

Terasecond

10^6 yr

Megaannum

10^15 s

Petasecond

2.3 × 10^8 yr

Galactic Year

10^9 yr

Eon

4.32 × 10^9 yr

Kalpa

10^18 s

Exasecond

10^21 s

Zettasecond

10^24 s

Yottasecond

10^27 s

Ronnasecond

10^30 s

Quettasecond

24

How many time zones are on Earth?

1038

How many miles are there per time zone?

7.442 × 10^9

What is the population of Earth?

3.3 × 10^8

What is the population of the United States?

4.875 × 10^6

What is the population of Alabama?

70%

What percentage of the Earth’s surface is water?

30%

What percentage of the Earth’s surface is land?

30%

What percentage of the Earth’s surface is vegetation?

33%

What percentage of the Earth’s surface is desert?

10%

What percentage of the Earth’s surface is ice?

16%

What percentage of the Earth’s land surface is North America?

12%

What percentage of the Earth’s land surface is South America?

7%

What percentage of the Earth’s land surface is Europe?

30%

What percentage of the Earth’s land surface is Asia?

5%

What percentage of the Earth’s land surface is Australia?

9%

What percentage of the Earth’s land surface is Antarctica?

20%

What percentage of the Earth’s land surface is Africa?

15 × 10^11 km

What is the distance between the Earth and the Sun?

4 × 10^5 km

What is the distance between the Earth and the Moon?

6 × 10^7 km

What is the distance between the Earth and Mercury?

4 × 10^7 km

What is the distance between the Earth and Venus?

2.3 × 10^8 km

What is the distance between the Earth and Mars?

8 ×10^8 km

What is the distance between the Earth and Jupiter?

1.3 × 10^9 km

What is the distance between the Earth and Saturn?

3 × 10^9 km

What is the distance between the Earth and Uranus?

4.4 × 10^9 km

What is the distance between the Earth and Neptune?

3 × 10^8 m/s

What is the speed of light?

3.5 × 10² m/s

What is the speed of sound?

9.8 m/s²

What is the acceleration due to gravity on Earth?

1.63 m/s²

What is the acceleration due to gravity on the Moon?

1 × 10^-32 kg

What is the mass of an electron?