Science & Mathematics - 9 January 2007

I have read those astronomical articles about how the stars we see in the sky, some are no longer there because they are already destroyed. What we are seeing now is a delay image because of the traveling of light.

So I want to ask, if one day we manage to achevie faster than light traveling devices, are we essentially travelling back in time? Since by all accounts we will be moving faster than light.

2007-01-09 20:14:20 · 8 answers · asked by wraithrune 2 in Physics

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When is the shortest distance between two points NOT a straight line?

Bet you clever gits can't answer that correctly......

2007-01-09 20:11:13 · 16 answers · asked by Anonymous in Geography

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Have we ever lost a space probe to a black hole?

When I say we, I mean we as in all space programs in all the countries, not just the U.S.'s NASA.

2007-01-09 20:09:02 · 9 answers · asked by Vada 1 in Astronomy & Space

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Does anyone know anything about the year 2036?

So today I received a phone call phone a number that came up unknown. There was no one there, but when I looked at the date my phone listed it as 10/13/36, which is impossible because...well it's impossible to receive a phone call of the year 2036. Or is it? So any ideas on the date and the year and so on..maybe someone else received a phonecall as well and it's just a virus that is put through the phone system?
Thanks very much for your help :)

2007-01-09 20:07:40 · 8 answers · asked by kroha37 1 in Astronomy & Space

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why do we need to use the toilet so often in cool rainy days?

2007-01-09 20:02:15 · 4 answers · asked by sapan b 1 in Weather

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How come hybrids dont breed true?

In science class my biology teacher made us put red eyed no wing male flys in a chamber with white eye winged female flys. He made them mate to have babies who made them mate to create hybrids or whatever. But how does that prove that hybrids dont breed true?

2007-01-09 20:01:09 · 1 answers · asked by Anonymous in Other - Science

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why doesn't a magnetic field extend indefinitely?

2007-01-09 19:57:48 · 5 answers · asked by Raymond 2 in Physics

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Equation for Concentric Circles?

I'm trying to work out an equation for the combined value of circumferences of a set of concentric circles.
For example - if we start with a circle of say, 5mm Dia, the Circumfence would be 15.71. If there was then
a circle placed outside of this at a 4mm distance it would have a dia of 13mm - the circumference of this
would be 40.83. Another one at 4mm offset from that would be 21mm (Circumference 65.96). Clear so far?

Well, if you add the above three figures, you get a value (15.71+40.83+65.96) = 122.5. What I want to get is
a simple equation where I can start with a Circle of 5mm, with 2 more Concentric Circles at an offset of 4mm
each time and arrive at the 122.5 I'm looking for. I would want this equation to work for any size circle, with
any number of concentrics and a delta offset (obviously a constant delta, though!). Hopefully I haven't lost you
now...

So for example if you had a circle of 25mm with 15 Concentric circles at an offset of 4mm
(so 25mm, 33mm, 41mm, 49mm) etc. - What would the total value of circumferences be for those 15 circles???

I am doing this so I can work out what the outside diameter a reel of webbing will be after a certain amount of
webbing has been wrapped onto a shaft of a particular diameter.

(Although I guess in reality the pure answer would actually be based on a helix.......)

2007-01-09 19:55:40 · 5 answers · asked by Miss M R Cook 1 in Mathematics

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Can you answer this question,please?

[not stupid at all]..
If sm1 wants really really bad to be you and you want really really bad to be her, is anything that you can try so change possitions? [i don't want stupid answers and no i don't watch TV at all, lol]

2007-01-09 19:49:29 · 13 answers · asked by kittana! 2 in Paranormal Phenomena

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what is the evolutionary way leading to gemulated sponges in fresh waters?why?

gemulated sponges are mainly found in fresh waters,but there are some in seas.what is the evolutionary pathway leading to this:
\1)there were sponges became gemulated in fresh waters,then migrated to the seas./or
2)there were sponges gemulated in the seas and only this kind of sponges could live in freshwaters,so fresh waters just contain this kind.
p.s.the spelling of gemul may be wrong.sorry

2007-01-09 19:49:17 · 1 answers · asked by Anonymous in Zoology

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Can Photons Push objects (Things with mass)?

2007-01-09 19:46:42 · 8 answers · asked by †ђ!ηK †αηK² 6 in Physics

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Water in a bath tub, does it turn a different way?

Depending on where your country is (north or south of the equator), does the water in a bath tub turn a different way when it goes down a plug hole. Why does this happen?

2007-01-09 19:41:49 · 7 answers · asked by Anonymous in Astronomy & Space

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Why cheetahs reluctant to attack humans?

Do they admire humans as a domain species?Do they think humans are friendly?Perhaps they consider human flesh as not so tasty?If they can bring down a gazalle,why not a man?Any ideas....

2007-01-09 19:38:13 · 7 answers · asked by Anonymous in Zoology

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algebra equations?

25x(nx3)=750 (n+7)x12=17x12 (n+4)x15=14x15

2007-01-09 19:38:00 · 3 answers · asked by marie b 1 in Mathematics

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For each set of ordered pairs, find fog and gof if they exist, f = {(1,1)(0,-3)} and g = {(1,0)(-3,1)(2,1)},?

Please show all the steps

2007-01-09 19:36:28 · 6 answers · asked by Anonymous in Mathematics

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What is "space" and "spatial technologies"?

I'm doing a Stage 1 Geography course and I am really confused about the term "space" which they use over and over again without definition.

The course themes include:
1. Effects of changes in technlogy on the spaces we live and work in
2. Effects of changes in space on society and its geography and spatial processes
3. How the above changes affect our view of what space is and how it acts on us

Spatial processes? Space acting on us? And what are spatial technlogies? Can anyone explain to me what space is? Suddenly this simple word seem to have so much hidden meaning..

2007-01-09 19:35:25 · 2 answers · asked by Ray M 1 in Geography

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Why there is no frogs in volcanic islands of oceans?

please answer by means of evolution.

2007-01-09 19:30:12 · 5 answers · asked by Anonymous in Zoology

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who is the firstman to get on to the moon?

guess!!!!!!!!!!!!

2007-01-09 19:29:32 · 13 answers · asked by Anonymous in Astronomy & Space