Fermi Questions C

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PM2017
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Re: Fermi Questions C

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Name wrote:
PM2017 wrote: Over the course of a regular NFL season, how many total passing yards are accumulated by all the teams combined?
*sighs as I realize not everything in fermi is scientific facts and having a life is probably a good idea*
ik NBA has 30 teams so lets assume the same thing. theres maybe 15 games so 4.5e2 games. A quarterback might throw 100 yards so 4.5e4 yards. However two teams are playing so 9e4 yards or 5 fermi yards
In 2017 the lowest passing yards accumilated by a team was 2811 yards and the highest was 4431 yards. Assuming the average of the two accuratly represents all 30 teams (which it appears to do so) the final passing yards is about 1.1e5 yards or 5 fermi
Evaluate
*sighs strongly...*
There are 32 teams...
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Re: Fermi Questions C

Post by NeilMehta »

PM2017 wrote:
Name wrote:
PM2017 wrote: Over the course of a regular NFL season, how many total passing yards are accumulated by all the teams combined?
*sighs as I realize not everything in fermi is scientific facts and having a life is probably a good idea*
ik NBA has 30 teams so lets assume the same thing. theres maybe 15 games so 4.5e2 games. A quarterback might throw 100 yards so 4.5e4 yards. However two teams are playing so 9e4 yards or 5 fermi yards
In 2017 the lowest passing yards accumilated by a team was 2811 yards and the highest was 4431 yards. Assuming the average of the two accuratly represents all 30 teams (which it appears to do so) the final passing yards is about 1.1e5 yards or 5 fermi
Evaluate
*sighs strongly...*
There are 32 teams...
Seeing that it's been almost two weeks, here's a new question:
What is the probability of flipping heads on a fair coin twenty times in a row?
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Re: Fermi Questions C

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NeilMehta wrote:
PM2017 wrote:
Name wrote: *sighs as I realize not everything in fermi is scientific facts and having a life is probably a good idea*
ik NBA has 30 teams so lets assume the same thing. theres maybe 15 games so 4.5e2 games. A quarterback might throw 100 yards so 4.5e4 yards. However two teams are playing so 9e4 yards or 5 fermi yards
In 2017 the lowest passing yards accumilated by a team was 2811 yards and the highest was 4431 yards. Assuming the average of the two accuratly represents all 30 teams (which it appears to do so) the final passing yards is about 1.1e5 yards or 5 fermi
Evaluate
*sighs strongly...*
There are 32 teams...
Seeing that it's been almost two weeks, here's a new question:
What is the probability of flipping heads on a fair coin twenty times in a row?
1/2^20, .3(20) is e6 1/e6= -6 Fermi answer -6
-6
Also my question has a Fermi answer of 9

Question: Niagra falls flows into lake Erie. If lake Erie was empty and Niagra falls continued to flow normally, how many years would it take for Niagra falls to replenish lake Erie?
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Re: Fermi Questions C

Post by bryan,boyd »

Hey guys, I know that there is some tricky math on Fermi that I have been learning how to do so try doing this one without a calculator:
3^342
May seem hard but there are some tricks you can use to get a quick answer :)
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Re: Fermi Questions C

Post by Name »

bryan,boyd wrote:Hey guys, I know that there is some tricky math on Fermi that I have been learning how to do so try doing this one without a calculator:
3^342
May seem hard but there are some tricks you can use to get a quick answer :)
log(3)= .477(342) = 163.134 fermi 163
is about 1.5E163 so 163
Back to my previous question:
Name wrote: Question: Niagra falls flows into lake Erie. If lake Erie was empty and Niagra falls continued to flow normally, how many years would it take for Niagra falls to replenish lake Erie?
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Re: Fermi Questions C

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Question: Niagra falls flows into lake Erie. If lake Erie was empty and Niagra falls continued to flow normally, how many years would it take for Niagra falls to replenish lake Erie?

In the hopes of some type of thread revival 
Niagara falls flows at 2E6 Liters/sec. Times 3e7 is 6e13 liters/yr. Volume Erie = 5E2 km, 5E14 liters/6E13= 1 fermi
Someone else can post
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Re: Fermi Questions C

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How many mistakes in DNA replication occur during a human’s lifetime?
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Re: Fermi Questions C

Post by Knyte_Xjn »

acidbeaker wrote:How many mistakes in DNA replication occur during a human’s lifetime?
I'll assume that there's 1 mistake per every 10^5 nucleotides, and given that there are 10^10 (?) base pairs per diploid cell, that should amount to 10^5 mistakes each time a cell divides. I'll assume that there are 10^13 cell divisions in the human body per day, and assuming that the average person lives to ~80 years, thats ~30000 days, so ~10^4. 10^5 * 10^13 * 10^4 = 10^22
Enzymes involved in DNA replication make approximately 1 mistake per 100,000 nucleotides. Since each diploid cell has a approximately 6 billion base pairs , that's roughly 120,000 mistakes every time a cell divides. There are 2 trillion cell divisions in the body per day. Given this information, the number of mistakes in DNA replication per day is 120,000 * 2e12 = 2.4e17 mistakes/day. The average life expectancy at birth was 72 years in 2018. 72*365 = 26280 days. At a rate of 2.4e17 mistakes/day over the course of 26280 days, ~6.31e21 mistakes in a human lifetime -> Fermi answer 22
Question: How many E. coli cells would it take to equal the mass of the Sun?
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Re: Fermi Questions C

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Knyte_Xjn wrote: Question: How many E. coli cells would it take to equal the mass of the Sun?
mass of ecoli is e-12 grams so 12 make up a gram or e15 make up one kg. Mass of sun is 2e30 kg so 45 ecoli
mass of sun is 2e30 kg. Google says a ecoli cell has a mass of -12 grams so 45
How many calories would it take for me to run the distance Voyager 2 is from the earth right now?
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Re: Fermi Questions C

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Name wrote: How many calories would it take for me to run the distance Voyager 2 is from the earth right now?
I know that you burn about 1E2 calories by running a mile, and I also know that that the Voyager 2 is about 1E10 miles away. This gives an answer of 1E10 calories burned.

[b]Fermi Answer 12[/b]
I was right about 100 calories being burned for each mile, and the Voyager 2 is currently 11 billion miles away from earth. Multiplying these two numbers gives an answer of 1.1E12.

[b]Fermi Answer 12[/b]
What is the angular momentum of the solar system around the Milky Way Galaxy? (use standard SI units)
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