Search found 10 matches

by Torterra
October 19th, 2017, 10:24 am
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

If the entire population of the earth was converted to energy and used to power a MacBook Air, how far would the chain of all the electrons that pass through the MacBook in that time stretch in light seconds?
by Torterra
October 5th, 2017, 10:13 pm
Forum: 2018 Lab Events
Topic: Materials Science C
Replies: 48
Views: 11458

Re: Materials Science C

Ok, thanks. I'll do that.
by Torterra
October 1st, 2017, 7:16 pm
Forum: 2018 Lab Events
Topic: Materials Science C
Replies: 48
Views: 11458

Re: Materials Science C

So, I'm kinda new to this event. Do you guys have any suggestions on a good place to start preparing?
by Torterra
September 15th, 2017, 12:01 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

Answer|The luminosity of the sun is about 1E24W. I know this fluctuates, but I'm going to assume it's constant. Assume the sun has a lifetime of 10 billion, or 1E10 years. There are 3E7 seconds in a year, which gives a total time of 3E17s. P=E/t, so the total energy is 3E41J. 1 kilogram of TNT has ...
by Torterra
September 13th, 2017, 9:33 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

Yeah, that's a good point. I think that bumps my answer up by 2 then.

How fast would Santa have to travel to visit every child in the world in one 24-hour period?
by Torterra
September 13th, 2017, 7:42 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

Answer|Radius of the earth is 6E6m. 4pir^2 gives a total surface area of 4.3E14. Assuming the earth is 75% water gives 3.2E14 m^2 of water. Assuming an average depth of 10m gives a volume of 3.2E15 m^3. The volume of a cylinder is pir^2h. Solving this for h gives a height of 1.1E15m. Pressure is eq...
by Torterra
September 13th, 2017, 5:23 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

Ok, thanks. I just figured that not all the calories in a can of soda come directly from sugar, and also that people eat a healthy amount. I probably am a bit low though. I'll ask another question. If an army of 500 industrious beavers wanted to log the entire Amazon rainforest, how long would it ta...
by Torterra
September 13th, 2017, 12:24 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

I'm still kinda new, any feedback would be appreciated. An abomination called my work|Assume the average American consumes 50g of sugar a day and 40 grams of sugar has 100 calories, giving 1.2E2 calories per person per day. Multiply by 3E8 people in America and 365 days to get 1.3E13 calories in a y...
by Torterra
September 11th, 2017, 1:50 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

Sorry, should have clarified. Only shells that are intact and on the surface to an inch deep. Any kind of shell though
by Torterra
September 11th, 2017, 12:33 pm
Forum: 2018 Question Marathons
Topic: Fermi Questions C
Replies: 175
Views: 44214

Re: Fermi Questions C

If she sells all the seashells on all the seashores on earth, how much money will she make?

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