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#101 2012-02-03 11:47:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#102 2012-02-03 22:14:01
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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:
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#103 2012-02-04 06:53:45
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#104 2012-02-04 07:00:08
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#105 2012-02-04 07:05:28
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#106 2012-02-04 07:08:14
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#107 2012-03-07 23:13:21
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#108 2012-03-08 00:58:24
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Fermi's questions!!!
Hi;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#109 2012-03-19 12:44:20
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#110 2012-03-19 15:52:34
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#111 2012-03-20 09:24:12
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#112 2012-03-20 12:25:15
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#113 2012-04-23 06:49:16
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#114 2012-04-23 09:24:14
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,619
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
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#115 2012-04-23 09:25:46
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#116 2012-07-20 06:38:44
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#117 2012-07-20 20:58:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Fermi's questions!!!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#118 2012-07-21 00:44:49
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#119 2012-07-21 00:50:45
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#120 2012-07-21 01:04:48
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#121 2012-07-21 01:06:43
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Fermi's questions!!!
Hmmm. I will throw them in.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#122 2012-07-21 01:10:48
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#123 2012-07-21 01:13:23
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#124 2012-07-21 01:55:20
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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
The knowledge of some things as a function of age is a delta function.
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#125 2012-07-21 05:18:02
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Fermi's questions!!!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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