Science & Mathematics - 20 October 2006

Okay, so my friends and myself have been having this debate for a few months now, on and off when we're bored. Here is the question:
Imagine that you standing in the center of a large room, with a roof above your head. Its nighttime and all four of the walls of this room are made of glass. So a satellite in the sky can't see you from directly above the building. But, from where you are standing you can see the night sky near the horizon through the windows. So, can a satellite see you from the horizon? Or would the curvature of the planet not allow that, even though you can see the sky? If you can see the night sky, can the night sky see you?

2006-10-20 02:51:47 · 8 answers · asked by Anonymous in Astronomy & Space

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what is the distance, in light years, across our solar system?

2006-10-20 02:51:29 · 6 answers · asked by Anonymous in Astronomy & Space

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Does Neil Armstrong really went on moon? I have doubts.?

Discovery Channel once revealed the story of Armstrong on Moon. Giving 6 reasons or questions not answerable by NASA.
What do you guys believe.

2006-10-20 02:46:01 · 26 answers · asked by Ashish 1 in Astronomy & Space

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Does anybody know the answer to this, square root of (-4)?

2006-10-20 02:42:46 · 12 answers · asked by Anonymous in Mathematics

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Physics question on sceince paper please help!!!?

The question is number 9 following this pdf link http://bmat.org.uk/downloads/BMAT_Introductory_Specimen_Paper.pdf

Can someone please expalin how you work out this question to get the answer E(300N) and what formulae are used? Thanks

2006-10-20 02:42:28 · 4 answers · asked by Jack R 1 in Physics

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Is time travel possible?

2006-10-20 02:41:06 · 12 answers · asked by relaxplease2005 3 in Physics

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Why do ice floats?

Solids should be denser than liquids, right?

2006-10-20 02:40:04 · 10 answers · asked by Maxwell O 1 in Other - Science

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Lacking confidence in upcoming maths exam..?

Ok basically in my mock Edexcel GCSE maths exam back in June i screwed up and ended up with an B and was predicted an A*. I'm now retaking it for a much better grade in November and need to encouragement i know i'm capable of it but just cant seem to get motivated!

2006-10-20 02:35:59 · 7 answers · asked by Anonymous in Mathematics

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zinc oxide + sulphuric acid = ????

2006-10-20 02:31:53 · 7 answers · asked by Anonymous in Chemistry

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Stupid Math Question - exponents?

Is there any way that -2 to the 4th power can equal anything but positive 16? My math teacher marked my answer wrong on a test.. She said the answer was -16. How is this possible? There were no parentheses. This is not a high level math class.

2006-10-20 02:29:01 · 10 answers · asked by Chris R 1 in Mathematics

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what kinda drugs are produced & transported to all of africa?

what kind of drugs are available and how effective are they? how do they work?

2006-10-20 02:22:30 · 2 answers · asked by pradeepkul88 1 in Medicine

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how can DRG (dorsal root ganglion) cultures be used in neuroscience cell biology and what can they measure?

2006-10-20 02:21:47 · 1 answers · asked by Anonymous in Biology

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Online Resources: Geometry proofs with answers?

I'm tutoring a geometry student, and I've noticed a glaring flaw in her textbook.

The book will show proofs for most theorems, however, it does not then have more than a couple of proof questions in the homework, and none of those show the answers. In essense, the book does not provide a mechanism for a student to practice their skills at doing a proof, and then checking their work. Obviously, proofs are showing up on quizzes and tests, and I'd like to provide her with some materials she can work with while studying outside our tutoring sessions.

Is there an online resource that has selected geometry proof problems, along with an answer key for a student to check their work?

2006-10-20 02:21:31 · 1 answers · asked by ³√carthagebrujah 6 in Mathematics

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are there chroloplasts in the guard cells?

2006-10-20 02:16:52 · 3 answers · asked by Anonymous in Biology

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why is africa the most affected contient by aids?

2006-10-20 02:15:18 · 21 answers · asked by pradeepkul88 1 in Biology

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What is the average feet per second blowing speed of a hair dryer?

2006-10-20 02:08:15 · 3 answers · asked by Freeman W 1 in Engineering

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The tree outside my window has developed black spots on its leaves. What is it?

I think the tree is a 10yr old maple and I've never seen such black spots before. Other trees don't seem to have it, but they're not maples.

The spots are about a quarter in size and they're all over the tree. Is it going to die? Or is it just a temporary disease, like a human chickenpox?

2006-10-20 02:06:52 · 10 answers · asked by Anonymous in Botany