Science & Mathematics - 6 November 2006

I've read that the builders of the Great Pyramid knew the earth was round because the dimensions of it are based on the exact size of the earth.

Is there a way to look at the stars or something and know the size of the earth?

And how come they knew something 5000 years ago we just figured out 500 years ago?

I have my ideas of how but I'd like to hear how you think they did it, also how did ancient people know exact north and south?

2006-11-06 07:27:40 · 8 answers · asked by Sean 7 in Astronomy & Space

im new to this, which sucks because i have so many question and im going to run out of points... aside from the point. I dont really want a 'definition" so to say although i would appreciate the gesture, i have looked it up an am still confused.

I just don't really understand the concept of what an allele is. thanx

2006-11-06 07:25:52 · 6 answers · asked by neuralverse 2 in Biology

Surely it must come to an end if you travelled long enough?

2006-11-06 07:25:18 · 13 answers · asked by Anonymous in Astronomy & Space

Rationalize this problem: cube root of 3a^2 over cube root of 9a

2006-11-06 07:23:58 · 5 answers · asked by brunette 1 in Mathematics

2006-11-06 07:22:52 · 10 answers · asked by Mysterious 2 in Mathematics

2006-11-06 07:21:20 · 2 answers · asked by Jason 1 in Earth Sciences & Geology

I've always wanted to see it....when is the best time of the year? Where is the best location?

2006-11-06 07:21:05 · 6 answers · asked by lolabellaquin 4 in Astronomy & Space

Hi, I was wondering if anyone could possibly find me or has a good simplified diagram showing the blood flow of oxygenated blood and deoxygenated blood. (preferably arrows indicating it using 2 different colours to differentiate the two). I need it for biology class cause we have to draw one, but i am having trouble finding a guide! THanks so much!

2006-11-06 07:18:16 · 3 answers · asked by Anonymous in Biology

Just always wanted to know!

2006-11-06 07:17:39 · 10 answers · asked by Anonymous in Zoology

2006-11-06 07:17:32 · 11 answers · asked by A True Gentleman 5 in Physics

I havent patended this yet so no one better steal it. OK, you know the evacuation seats on jets, what if they put those in helicopters just in case theyre falling or some thing? Wouldnt that be a great invention? What do you think?

2006-11-06 07:16:51 · 11 answers · asked by Anonymous in Other - Science

liquid chemical

2006-11-06 07:16:13 · 7 answers · asked by Anonymous in Engineering

2006-11-06 07:14:55 · 16 answers · asked by BaD mAn R 1 in Biology

measurenment would change?

2006-11-06 07:13:28 · 3 answers · asked by qutiepy9 2 in Biology

2006-11-06 07:12:45 · 6 answers · asked by BaD mAn R 1 in Biology

2006-11-06 07:11:25 · 1 answers · asked by Anonymous in Engineering

I am going to attempt to build an unlimited source of free energy utilizing magnets. Do magnets wear out over time?

2006-11-06 07:11:25 · 8 answers · asked by preston 2 in Engineering

2006-11-06 07:10:57 · 11 answers · asked by BaD mAn R 1 in Biology

2006-11-06 07:10:35 · 16 answers · asked by Anonymous in Chemistry

a pump under constant pressure uses 25000 joules of energy (work to move 30m squared of water. find the pump pressure required to do the work.

2006-11-06 07:09:57 · 1 answers · asked by Chris D 1 in Physics

If you went back in time, would you be able to change events that have already happened? What happens if you modified the past and got stuck in a loop. For Example: You hate ure grand-father, and go in the past and kill him. But if he was killed, then your father cannot have been borned and neither you. If you couldn't have been born then how did you go back in the past and killed your grand-father, meaning you didn't so if you didn't.... (you get the cycle)

2006-11-06 07:09:27 · 6 answers · asked by Georges K 1 in Physics

I am looking at the full moon right now from North Devon in UK. It appears to have a white then orange and a fainter blue aura around it. I've not seen this before (perhaps I havn't been looking). What causes this and why?

2006-11-06 07:09:17 · 11 answers · asked by Gin & Tonic 4 in Astronomy & Space

2006-11-06 07:08:31 · 12 answers · asked by Paul R 1 in Mathematics

2006-11-06 07:05:43 · 5 answers · asked by Jason 1 in Botany

Pierre bought a coat for $154.10 that was listed for $335.00. What rate of discount did he receive?


I want to know because there are more like this on my work.

2006-11-06 07:05:36 · 9 answers · asked by Me 6 in Mathematics

2006-11-06 07:04:14 · 2 answers · asked by Perfection 4 in Engineering

2006-11-06 07:03:43 · 4 answers · asked by whe_86 1 in Chemistry

2006-11-06 07:03:16 · 14 answers · asked by Anonymous in Zoology

Does this imply that prokaryotic cells don't undergo mitotic division?

2006-11-06 07:02:55 · 4 answers · asked by Kat 1 in Biology

2006-11-06 07:01:41 · 6 answers · asked by Anonymous in Engineering