Science & Mathematics - 24 December 2007

I have some unfinished agates...20 gms to 2kg...weight...but I cant determine that which agate is precious..? I have some landscape agates too...from where I can find such information?
how can I find the value of such stones..?

2007-12-24 23:59:18 · 1 answers · asked by Rajendra Malviya 1 in Earth Sciences & Geology

....and the angle seperating its source from the target?

I remember such a thing from my physics courses, it had a shape similar to Y = A *sin x and was useful to understand engines.

2007-12-24 23:58:04 · 4 answers · asked by Roy Nicolas 5 in Physics

I have some unfinished agates...20 gms to 2kg...weight...but I cant determine that which agate is precious..? I have some landscape agates too...from where I can find such information?
how can I find the value of such stones..?

2007-12-24 23:57:37 · 1 answers · asked by Rajendra Malviya 1 in Earth Sciences & Geology

Can you give me the exact link.

2007-12-24 23:50:40 · 2 answers · asked by ashish n 1 in Geography

I am puzzled by the meaning of Land of the Ascending Sun (Jpn).

2007-12-24 23:48:22 · 4 answers · asked by Roy Nicolas 5 in Geography

2007-12-24 23:36:39 · 5 answers · asked by Anonymous in Physics

I was watching a movie recently (the title is slipping my mind) and there was a scene with a business jet that was climbing vertically. I made the comment that it was impossible for a consumer level jet to perform such a task due to their low thrust to weight ratio, and the lack of rigidity of their airframe. I'm fairly confident that a business jet can't produce enough power to overcome its own lift and the force of gravity, and even if it could, its airframe would suffer catastrophic failure. I then furthered my argument by stating that some jets are able to CLIMB vertically, but to my knowledge there is only one jet that can ACCELERATE vertically: the F-16, due to its thrust-to-weight ratio greater than the value 1. Am I correct in every aspect of my knowledge? Can business jets CLIMB vertically? Can business jets ACCELERATE vertically? Are there other jets besides the F-16 that can ACCELERATE straight vertically? Easy 5 stars.... Thanks for the help!!!

2007-12-24 23:32:16 · 8 answers · asked by mike 2 in Engineering

I was watching a movie recently (the title is slipping my mind) and there was a scene with a business jet that was climbing vertically. I made the comment that it was impossible for a consumer level jet to perform such a task due to their low thrust to weight ratio, and the lack of rigidity of their airframe. I'm fairly confident that a business jet can't produce enough power to overcome its own lift and the force of gravity, and even if it could, its airframe would suffer catastrophic failure. I then furthered my argument by stating that some jets are able to CLIMB vertically, but to my knowledge there is only one jet that can ACCELERATE vertically: the F-16, due to its thrust-to-weight ratio greater than the value 1. Am I correct in every aspect of my knowledge? Can business jets CLIMB vertically? Can business jets ACCELERATE vertically? Are there other jets besides the F-16 that can ACCELERATE straight vertically? Easy 5 stars.... Thanks for the help!!!

2007-12-24 23:30:39 · 7 answers · asked by mike 2 in Astronomy & Space

I've downloaded a Southern Hemisphere sundial construction template from http://liftoff.msfc.nasa.gov/Academy/Earth/Sundial/Sundial-ConstructSimple.html
But I do not know how to use it to tell the time. How do I do it? Thanks

2007-12-24 23:27:17 · 2 answers · asked by June. 1 in Astronomy & Space

i have a scooter for my daughter and it says holds up th 80kg. I just need to know how much that is in pounds (lb).

2007-12-24 23:19:36 · 8 answers · asked by Rebecca M 1 in Mathematics

2007-12-24 23:05:13 · 11 answers · asked by Ashvin Parker 1 in Geography

2007-12-24 22:52:04 · 7 answers · asked by Anonymous in Mathematics

I GOT A COMPUTER!!!!!..I GOT A COMPUTER!!! I GOT A COMPUTER!!!!!! With a FLATSCREEN MONITOR !!!
I don't have to wait in line for the computer anymore!! I have one of my own! I can get on ANY TIME I WANT TO!!!! La La La La La La....I'M SOOOO HAPPY!!!!!! Now I can talk to the DAYTIME Paranormal people!!!!

2007-12-24 22:51:38 · 14 answers · asked by Deenie 6 in Paranormal Phenomena

As you all know that vegetables are being planted and grown in farms with lots of care from the farmers. However, before human made farms, how did all those vegetables existed? are there wild vegetables?

2007-12-24 22:41:39 · 11 answers · asked by alsayaari 1 in Agriculture

2007-12-24 22:40:37 · 10 answers · asked by Anonymous in Zoology

2007-12-24 22:33:45 · 11 answers · asked by Anonymous in Mathematics

Ok so I see this red non twinkling star in the sky here in Australia and it is low so I get my telescope out because I know it is a planet (Mars I am assuming) I put in the Barlow and the K20 eyepiece and it still looked the same size as I could see with the naked eye. I put in the SR4 eyepiece on its own and it looked the same and then did the Barlow with that one and couldn't see anything. Shouldn't I be able to get a closer view? I have the Celestron Power 127mm .

2007-12-24 22:28:34 · 5 answers · asked by canadiangirlinaussieland 2 in Astronomy & Space

with movies like i am legend and 28weeks later, what is the possibility that a virus or any microbe or any other type of matter can actually cause a human to lose all rationality and become beast like and attack and kill like in the movie??

hehe or am i being juz ultra paranoid just after watchin i am legend lol

2007-12-24 22:02:19 · 10 answers · asked by acnemycin 3 in Biology

2007-12-24 21:58:44 · 14 answers · asked by k a t 2 in Medicine

2007-12-24 21:55:36 · 3 answers · asked by Anonymous in Physics

2007-12-24 21:46:12 · 2 answers · asked by miroasusglx 2 in Other - Science

2007-12-24 21:21:09 · 4 answers · asked by kedarnath s 1 in Engineering

2007-12-24 21:20:32 · 4 answers · asked by sousa 1 in Other - Alternative

I didn't know there were codes( predicting things) in the Old Testament. Did you know about it? I think I remember hearing something about it one time...but it's really interesting.

2007-12-24 21:15:25 · 7 answers · asked by Deenie 6 in Other - Alternative

1) Alpha,Beta and Gamma Rays show different order of penetration power.
2) X-rays are also called as Anode rays
3) There is a direct correlation between X-rays and the atomic numbers.
4) Cathode rays exhibit the e/m ratio constant.
5) Line spectrum is considered as the finger print of the atoms af an element.

2007-12-24 21:13:33 · 2 answers · asked by Anonymous in Chemistry

I want to know the latest news about blackhole?May I get some picture of blackhole?

2007-12-24 21:05:33 · 3 answers · asked by Anonymous in Astronomy & Space

I want to improve my arithmetic. Can you recommend any free software or a site I could go on?

2007-12-24 20:48:53 · 6 answers · asked by tuthutop 2 in Mathematics

A circular pond of radius 12 m has a layer of ice 0.25 m thick. On a spring day, the temperature of the water below the ice is 4.0°C and the temperature of the air above is 11°C. What is the rate of heat transfer through the ice, in kW?


- The thermal conductivity of air k (W/mK) is 0.025 , and its thermal resistance RSI-value (m2 x K/W) (for 1 inch) is 1.00 and R-value (ft2 x F° x h/Btu) is 5.70.
- The thermal conductivity of water k (W/mK) is 0.598, and its thermal resistance RSI-value (m2 x K/W) (for 1 inch) is 0.04 and R-value (ft2 x F° x h/Btu) 0.24.
- The thermal conductivity of 0° C ice k (W/mK) is 2.14 , and its thermal resistance RSI-value (m2 x K/W) (for 1 inch) is 0.01 and R-value (ft2 x F° x h/Btu) 0.07.
-These values are at 10^5 Pa, 20°C.


Thus far, my answer of 25 kW was incorrect, help please?

2007-12-24 20:44:54 · 3 answers · asked by Xar 1 in Physics

prove that any subgroup H of G with index 2 is normal but not conversly

2007-12-24 20:28:16 · 1 answers · asked by Anonymous in Mathematics

is U(30)/U_5(30) isomorphic to Z_2 + Z_2
orZ_4
plzzzzzzzzzz explain

2007-12-24 20:25:04 · 2 answers · asked by Anonymous in Mathematics