Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

## #126 2012-07-22 03:26:56

anonimnystefy
Real Member

Offline

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

Good. I will post more if I think of any.

Oh, here is one:

Q:"If a room 4x4x2 was filled with as much McDonald's hamburgers and a starving person somehow absorbed every single calorie out of it, would it be enough to have him run once around the Earth? If not, then what would be the smallest room filled with hamburgers that would enable him to do that?"

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

## #127 2012-08-27 05:10:25

bobbym

Online

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

It would depend on what you mean by running around the earth. A great circle?

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.

## #128 2012-08-27 05:12:40

anonimnystefy
Real Member

Offline

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

Let's say- the equator.

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

## #129 2012-08-27 05:34:34

bobbym

Online

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

4x4x2? Meters, inches, feet?

Wait, I asked that same question for the popcorn question. You answered in meters. Hold on calculation is coming...

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.

## #130 2012-08-27 05:55:52

anonimnystefy
Real Member

Offline

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

Meters.

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

## #131 2012-08-27 07:08:07

bobbym

Online

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

A typical burger (quarter pounder ) of this type has a 4'' diameter bun. This can verified on the net and was standard from 2009. We round this to .1 m

We estimate its height at about .05m high and it is approximately cylindrical in shape. This burger then has a volume of .00078539 cubic meters.

The room has a volume of 32 m^3, so 40000 burgers (quarter pounders ) can be stuffed into the room. The caloric intake of one burger is 460 calories.

Now everyone on this planet and many others knows that you can walk briskly(4 mph ) for 20 minutes on 4 calories! So you can probably run for 5 minutes ( assuming a near linear relationship ) on 4 calories. Let's round this to 5 calories or 1 calorie provides 1 minute of running at say 12 mph.

We have a total calorie count of:

That is

of running at 12 mph.

So we can run around the earth approximately

147 times.

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.

## #132 2012-10-06 13:01:55

ryandm
Novice

Offline

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

What does General Sherman (a sequoia tree and the world's largest tree) weigh, measured in units of US dollar coins?

## #133 2013-04-20 18:13:54

Mrwhy
Full Member

Offline

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

Avagadro number (6 times 10^23 maybe)
times
6 /22.4  vol of lung
times
1/N fraction-fill (1/4 maybe)
times
20% oxygen