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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

Hmmmm? I thought you would say something else.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

Hi;

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

Hi bobbym

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

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.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,466

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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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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You should notice that this thread is in Exercises and not Help Me.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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Hi

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

Hi bobbym

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

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.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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It is night for most of them. But the people who work night shifts do not sleep at night.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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Hmmm. I will throw them in.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

Throw them in? In what? A cage?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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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.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,603

That is for you to find out.

Have you got the estimate?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 88,723

**In mathematics, you don't understand things. You just get used to them.**

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