Science & Mathematics - 19 December 2007

My triangular prism is made of perspex. I have tried using florescent lights, torchlights, but I still can't see the spectrum. Does it work only with sunlight?

2007-12-19 23:55:15 · 5 answers · asked by E-girl 2 in Physics

Why is the diagram on the left required to prove the Pythagorean Theorem, when the diagram on the right seems sufficient to do so?
http://jwilson.coe.uga.edu/EMT668/emt668.student.folders/HeadAngela/essay1/image1.gif

2007-12-19 23:40:22 · 7 answers · asked by Anonymous in Mathematics

I'm curious to know what other things a ghost hunting team can investigate.This information will be useful for a story I'm writing. Be sure to provide enough detail. REPLY AS SOON AS POSSIBLE. Thanks for your help.

2007-12-19 23:36:24 · 14 answers · asked by dyoung852003 1 in Paranormal Phenomena

If x = 9tan(theta) and theta is in the first quadrant, find the expression for sin(theta) and cos(theta) in terms of x.

can someone show me how to do this step by step?

2007-12-19 23:25:25 · 3 answers · asked by SK 1 in Mathematics

x<4
y<4
Can we say that x+y<8 so x+y-8<0?

2007-12-19 23:14:13 · 5 answers · asked by Anonymous in Mathematics

What is your favorite math topic? Why? I love geometry because geometric shapes are so beautiful and geometric proofs increase my attention to detail.

What about you? Tell me about your math experience and what your favorite math topic is and why?

2007-12-19 23:14:08 · 8 answers · asked by Anonymous in Physics

I got an early Christmas present and it was a Celestron PowerSeeker 127mm telescope and I am not sure how to use it and feel like I jumped in the deep end.

I am assuming the dial on the equatorial mount numbered from 0 to 90 is the degrees and if I am 37 sth from the equator I need to set it to 53 to point at the south something...

There are 2 other dials that I have nfi about and they are the right ascension setting circle and the declination setting circle. I would love if someone could help me figure out how to find a planet by using these settings because even though the moon is beautiful and exciting I really want to see the ISS on Boxing Day and the polar caps on Mars. TIA!!!

Sarah

2007-12-19 23:14:04 · 7 answers · asked by canadiangirlinaussieland 2 in Astronomy & Space

logx^2 + logx^3 / log(100x) = 3

all logs in base 10. can someone show me how to solve this step by step?

2007-12-19 23:13:58 · 8 answers · asked by SK 1 in Mathematics

What is your favorite math topic? Why? I love geometry because geometric shapes are so beautiful and geometric proofs increase my attention to detail.

What about you? Tell me about your math experience and what your favorite math topic is and why?

2007-12-19 23:13:45 · 6 answers · asked by Anonymous in Mathematics

Two Moons On The Same Day - The Latest 'Old' Hoax

2007-12-19 23:09:24 · 6 answers · asked by Rhine 1 in Astronomy & Space

2007-12-19 23:03:39 · 6 answers · asked by Brigi o 1 in Earth Sciences & Geology

2007-12-19 22:55:33 · 28 answers · asked by thomasmcneilage 1 in Geography

are we in any real danger of a meteor destroying the planet in our lifetime??!!

2007-12-19 22:54:42 · 9 answers · asked by pigeontink 1 in Astronomy & Space

According to farmgirl we have no Jungles in Australia. Any one wanna back this up.. or dispute it? Or should we just blame it on language differences? For more info check out her question.

I'm a celebrity? - from farmgirl -

2007-12-19 22:31:56 · 10 answers · asked by caijun3d 1 in Zoology

2007-12-19 21:41:45 · 6 answers · asked by Fallen Angel 2 in Parapsychology

2007-12-19 21:38:07 · 12 answers · asked by Fallen Angel 2 in Parapsychology

if u have time machine and have a chance to go in past tell me

1. whom u wana meet
2 by viewing today what kind a change u made in past for better today

2007-12-19 21:36:32 · 12 answers · asked by max 2 in Astronomy & Space

2007-12-19 21:36:11 · 5 answers · asked by Fallen Angel 2 in Parapsychology

2007-12-19 21:26:53 · 11 answers · asked by eva m 3 in Mathematics

Please don't say gravity as I know that sticks us to the Earth. For example, why are those of us on the side of the planet still not stuck to the Earth by our Feet but kinda' hanging off sideways. I hope people can understand my zany but good question.

2007-12-19 21:26:51 · 8 answers · asked by Anonymous in Physics

15: 10 degrees = ____ minutes
a. 1/60
b. 10
c. 60
d. 600


16: 1 minute = ____ degree
a. 1/3600
b. 1/60
c. 10
d. 60


17: 1 minute = ____ seconds
a. 10
b. 60
c. 100
d. 3600



19: 3 degrees, 45 minutes + 2 degrees, 15 minutes = _____________
a. 5 degrees
b. 5 degrees, 60 minutes
c. 6 degrees
d. 60 degrees

help!thanks!

2007-12-19 21:21:55 · 7 answers · asked by Anonymous in Mathematics

Well, this may seem like an odd question but it has bugged me for a while. I'm not so au fais with Biology, Genetics and the like so would appreciate it if someone could enlighten me. They say that every person is different and that all humans are 99.99% alike, I don't know if that is a true estimate. But within races, for there to actually be races, that is for people to be distinguishable as being Black, White, Chinese etc..wtih their own set of unique, discernable features there must be SOMETHING in the genes unique to each race which defines them - which gives them the physical traits that they possess as a race (such as curly hair or dark/light skin) and seperates samples of Human DNA from different races.

What is it?

2007-12-19 21:19:18 · 4 answers · asked by Anonymous in Biology

I remember seeing on a medical show on TV (Famous Diagnoses) the extremely rare occurrence of people having more than one kind of DNA. For example they tried to take one woman's child from her claiming it wasn't hers because the DNA test came back and it showed no relationship. It later turned out that depending on where on her body they obtained the cells she had 2 types! One showed that indeed the girl WAS her daughter

Another woman had one DNA on one side of her body and a different one on the other. In fact looking closely, the skin tones were even different.

Can anyone tell me where I might get references to this kind of thing?

2007-12-19 21:11:58 · 4 answers · asked by roccopaperiello 6 in Biology

2007-12-19 20:59:56 · 9 answers · asked by jonny d 1 in Mathematics

2007-12-19 20:52:11 · 18 answers · asked by Anonymous in Earth Sciences & Geology

Visitors(aliens) activated my DNA as a psychic,Clairvoyance Medium,full strength,without any warning,having to use the Higher Balence Institute, to gain controll,of my powers and to recieve the right knowledge=the truth!

2007-12-19 20:49:59 · 7 answers · asked by Mike2K 1 in Astronomy & Space

2007-12-19 20:45:41 · 7 answers · asked by jonny d 1 in Mathematics

does it mean 900%?

its a truck or suv commercial.

thanks

2007-12-19 20:43:25 · 3 answers · asked by viajero_intergalactico 6 in Mathematics

2007-12-19 20:39:22 · 2 answers · asked by Sakib 3 in Astronomy & Space

Note: Mexico city doesn't count as it was originally an island smack dab in the middle of Lake Texcoco.

2007-12-19 20:11:20 · 6 answers · asked by Anonymous in Geography