Science & Mathematics - 17 July 2006

I mean, why do people make up conspiracy theories and such? Who says that if they exist (personally, I believe the chances of us being alone in the universe, and to a second degree the galaxy, to be very very slim), they`re concerned with us? Why would they come here? And why do the people who firmly believe about UFOs, why do they make such a big deal of it? So we might not be alone, so what?

2006-07-17 21:49:42 · 14 answers · asked by Among Others 1 in Astronomy & Space

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Carbonic Acid + Zinc = ??

Isn't tha answer is Zinc carbonate + -----plus what?
and another is Lead + Nitric Acid = ...i dont know what's that...

2006-07-17 21:43:33 · 8 answers · asked by paparuscy_s 1 in Chemistry

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What keeps you cooler, a hot or a cold drink?

And can you tell me the scientific reason behind your answer?

2006-07-17 21:42:26 · 18 answers · asked by Anonymous in Other - Science

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can we able to find out some chemical solutions for creating invisible man?

i`m in curious to know whether a man can find solution, that can he become invisible in this world. He should be a man and he can see the world and its living being. "But he wasn seen to others in this world". Is this possible".....

2006-07-17 21:30:10 · 10 answers · asked by Anonymous in Chemistry

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Sulfuric Acid + Calcium carbonate = ????

Isn't the answer is Calcium sulfate + carbon dioxide + water ??

2006-07-17 21:29:20 · 11 answers · asked by paparuscy_s 1 in Chemistry

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Is this the end of this world and a start of another one?

I am mayan, and have experienced paranormal occurances with my life. I have come to believe in psychics because I do what they can do. There is always a limit in our minds but with practice we can all experience things that we are meant to experience and not have it supressed by superficial ways. Before I knew of my background and of the paranormal, I have always had (as the popular vote likes to call it unusual but its normal for me) experiences that involve precieving the future. I say we are in a transition of the world and have felt it all my life. What say you?

2006-07-17 21:28:03 · 8 answers · asked by Tense 1 in Physics

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find x when 4:7 = x:5?

this is a maths question. i don't know how to do this question. this question is on ratio and proportion. this is a secondary 1 subject.

2006-07-17 21:25:55 · 17 answers · asked by Anonymous in Mathematics

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what about gas detectors?

2006-07-17 21:20:42 · 4 answers · asked by Anonymous in Engineering

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how can i find my old friends back?

2006-07-17 21:19:54 · 5 answers · asked by conan edogawa 1 in Biology

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Is chemiluminescence safe to do at home?

Hello

If anyone can help me it would be much appreciated. I am a young highschool student who loves to experiment now I have taken high school chemistry and did get an A in it but I am not sure if either of these are entirely safe to do at home. I have tried to look up MSDS of these chemicals but have not been able to find an exact msds for these and as such am a little worried.

The following links are the two experiments Ive seen they differ slightly my questions are

A) which one of these methods is the safest?
B) how safe exactly is it? is it safe to do at home?
C) how hard is it to get the chemicals needed to do these?

Site A)
http://cas.bellarmine.edu/chem117a/lab/luminol.htm

Site B)
http://library.thinkquest.org/3310/nographics/experiments/lumine.html
I believe this is the same experiment
http://qsad.bu.edu/curriculum/labs/Luminol3_1.html

If anyone knows of a safer way to perform this experiment i would really appreciate any step by step instructions

Thank you very much.

2006-07-17 21:17:43 · 2 answers · asked by Anonymous in Chemistry

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what is ion?

How we can explain for a child what is ion?
I would like to see a vedio explaining what is ion, and how the atom become an ion?

2006-07-17 21:11:27 · 6 answers · asked by Seema 1 in Chemistry

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Do boogers have any other uses than a snack for 5 year olds?

2006-07-17 21:10:27 · 12 answers · asked by Mr. Stubbs 1 in Other - Science

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is the aluminum foil we use for wrapping food made of pure aluminum or a mixture of metals?

2006-07-17 21:09:41 · 6 answers · asked by sianz 2 in Chemistry

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Is there any biological explanation why the human female has stopped growing facial hair as males do?

Our ancestors were monkey like, with male and female faces covered with hair. Now, adult males grow much more facial hair than adult females.
Is there any concrete biological explanation (or advantage) from this?

2006-07-17 21:03:29 · 8 answers · asked by alexsopos 2 in Biology

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How many combinations can you get with four numbers?

2006-07-17 21:02:42 · 38 answers · asked by Anonymous in Mathematics

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Maths help?

I need help with this sum. Plz give the ans with procedure.

A cylindrical barrel 70 cm in diameter and 80 cm in height is filled with water. A leak at the bottom drains away 0.2 litres of water every minute. HOw long will it take for the water level to drop by 6cm?

PLz ans the sums with procedure. I will be really thankful to u.

2006-07-17 21:02:04 · 10 answers · asked by Faizan 1 in Mathematics

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Do u think the modern medical technology will stop the evolution of species(including us)?

U can see that the evolution happened when the species mutated.. Then comes the new species. That's how humans mutated from monkeys thousands of centuries ago.
But now the modern medical tech is healing all the deseases and mutations, i believe it will stop the evalution!
Don't u think it is bad and againt the nature rules?

2006-07-17 20:44:07 · 4 answers · asked by a V a 4 in Biology

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Answer this: Fish or fish egg comes first?

2006-07-17 20:41:41 · 14 answers · asked by a V a 4 in Biology

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lessons from monkeys?

d

2006-07-17 20:35:56 · 12 answers · asked by ang s 1 in Geography

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Why are weather forcasters wrong so much?

Where I live, they are constantly getting it wrong. They promise sunshine for the next 3 days and then that very night it rains!!
What is up with these clowns?

2006-07-17 20:31:02 · 8 answers · asked by Anonymous in Weather

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