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## #101 2012-02-04 10:47:12

bobbym
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### 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.

## #102 2012-02-04 21:14:01

bobbym
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### 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.

While NGC 7380 in Cepheus is 11500 light years away.

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.

## #103 2012-02-05 05:53:45

anonimnystefy
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### Re: Fermi's questions!!!

nice work bobbym!!!

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #104 2012-02-05 06:00:08

bobbym
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### 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.

## #105 2012-02-05 06:05:28

anonimnystefy
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### Re: Fermi's questions!!!

like what?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #106 2012-02-05 06:08:14

bobbym
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### 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.

## #107 2012-03-08 22:13:21

anonimnystefy
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### 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?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #108 2012-03-08 23:58:24

bobbym
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### 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.

## #109 2012-03-20 11:44:20

anonimnystefy
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### Re: Fermi's questions!!!

Hi bobbym

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

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #110 2012-03-20 14:52:34

bobbym
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### 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.

## #111 2012-03-21 08:24:12

anonimnystefy
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### Re: Fermi's questions!!!

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

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #112 2012-03-21 11:25:15

bobbym
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### 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.

## #113 2012-04-24 04:49:16

anonimnystefy
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### 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.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #114 2012-04-24 07:24:14

bob bundy
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### 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 … mp;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

## #115 2012-04-24 07:25:46

anonimnystefy
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### Re: Fermi's questions!!!

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

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #116 2012-07-21 04:38:44

anonimnystefy
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### Re: Fermi's questions!!!

Hi

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

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #117 2012-07-21 18:58:18

bobbym
Administrator

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### 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.

## #118 2012-07-21 22:44:49

anonimnystefy
Real Member

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### Re: Fermi's questions!!!

Hi bobbym

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #119 2012-07-21 22:50:45

bobbym
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### 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.

## #120 2012-07-21 23:04:48

anonimnystefy
Real Member

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### Re: Fermi's questions!!!

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

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #121 2012-07-21 23:06:43

bobbym
Administrator

Online

### 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.

## #122 2012-07-21 23:10:48

anonimnystefy
Real Member

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### Re: Fermi's questions!!!

Throw them in? In what? A cage?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #123 2012-07-21 23:13:23

bobbym
Administrator

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### 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.

## #124 2012-07-21 23:55:20

anonimnystefy
Real Member

Offline

### Re: Fermi's questions!!!

That is for you to find out.

Have you got the estimate?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #125 2012-07-22 03:18:02

bobbym
Administrator

Online

### 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.

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