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#101 2012-02-03 11:47:12

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Physics uses math but Fermi is a physicist. Not complaining about the questions just saying why I will not be posing any.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#102 2012-02-03 22:14:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Sorry, forgot that you want me to bump threads here rather than tack on to an existing post. Since this is your thread I will comply.

To answer your question. If we stacked 6.022 x 10^23 sheets of A4 paper we would get an answer between

and

due to the fact that the thickness of a sheet of paper is between .07mm and .18mm.

M37 a star cluster in the dreaded Orions belt is 4400 light years away.

m37_star-cluster.jpg

While NGC 7380 in Cepheus is 11500 light years away.

dso-ngc-7380.jpg

So it is obvious we do not need super luminar capabilities, just a lot of paper! We could stack em up and climb to those places. First we must grow giant trees for the paper:

http://www.mathisfunforum.com/viewtopic … 04#p116604


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#103 2012-02-04 06:53:45

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

nice work bobbym!!!


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#104 2012-02-04 07:00:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Hmmmm? I thought you would say something else.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#105 2012-02-04 07:05:28

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

like what?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#106 2012-02-04 07:08:14

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Oh nothing. As me ole pappy used to say, "pass me the chicken." That statement has nothing
to do with what we are talking about but I will always remember it.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#107 2012-03-07 23:13:21

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Q: If all humans in the world would go inside a single square room then what would be the least possible dimensions of that room?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#108 2012-03-08 00:58:24

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Hi;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#109 2012-03-19 12:44:20

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Hi bobbym

It doesn't have to be a cube.And people cannot stand on top if each other.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#110 2012-03-19 15:52:34

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Hi anonimnystefy;

Why not? I can get more of them in there then.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#111 2012-03-20 09:24:12

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

It's inhumane! I want them all to be standing on the ground.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#112 2012-03-20 12:25:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Okay, based on my newest pat down of 63 people the average human
is 10 inches deep, 24 inches wide so first we get the area,

Now there is the little matter of their height. I went for headroom here. Gave them 91 inches because some humans are that tall.

So I have them in a square room ( the floor is a square ) that is


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#113 2012-04-23 06:49:16

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Here's a tough one:

"Cannibalism is very judged in the modern society, but some may not know that we actually,we eat atoms of other humans every day.How many atoms of Julius Caesar do you eat every day?"

This one is very tough,and I don't think I would be able to solve it.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#114 2012-04-23 09:24:14

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,311

Re: Fermi's questions!!!

I once read a book in which the author calculated how many atoms once breathed by Leonardo Da Vinci, we inhale with each breath.

I thought it was written by George Gamow but I cannot trace it in any of his works.

However, I did find the calculation.

http://www.bigsiteofamazingfacts.com/ho … -we-inhale

see also

http://books.google.co.uk/books?id=yQ8w … ci&f=false

You might find the calculation helpful in giving you the idea for your latest question.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#115 2012-04-23 09:25:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

You should notice that this thread is in Exercises and not Help Me.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#116 2012-07-20 06:38:44

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Hi

Q: How many people are sleeping at this moment? Round down to 20.30 CET.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#117 2012-07-20 20:58:18

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#118 2012-07-21 00:44:49

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Hi bobbym


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#119 2012-07-21 00:50:45

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

I have to disagree, These are all people east of your timezone by 3 hours or more. That is night for them.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#120 2012-07-21 01:04:48

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

It is night for most of them. But the people who work night shifts do not sleep at night.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#121 2012-07-21 01:06:43

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Hmmm. I will throw them in.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#122 2012-07-21 01:10:48

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

Throw them in? In what? A cage?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#123 2012-07-21 01:13:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!

Now you are changing the problem to one about cage throwing. Are there tigers in the cages?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#124 2012-07-21 01:55:20

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,397

Re: Fermi's questions!!!

That is for you to find out.

Have you got the estimate?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#125 2012-07-21 05:18:02

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,605

Re: Fermi's questions!!!


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

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