Science & Mathematics - 6 February 2007

2007-02-06 15:14:55 · 2 answers · asked by Doc Manhattan 3 in Geography

The lizards that live on the galopagos islands i need imformation on that can you plzzzzzzzzzzz help me. can you atlest give 1 paragraph i will choose you as best answer.

2007-02-06 15:13:43 · 2 answers · asked by Noor 3 in Zoology

2007-02-06 15:13:33 · 10 answers · asked by Chef Dane 2 in Astronomy & Space

I think its a jade.... a chinese jade, or african jade?
or is this a turquise kind of stone? what is the white part? white jade? this necklace is in the movie sahara, and im looking to make one like it...thanks

http://www.starshiptroopers.net/DirkReplica1.jpg

2007-02-06 15:13:09 · 4 answers · asked by Anonymous in Earth Sciences & Geology

If a certain source emits radiation of wavelength 360. nm what is the energy, in kJ, of one mole of photons of this radiation?

2007-02-06 15:12:28 · 2 answers · asked by Anonymous in Chemistry

2007-02-06 15:11:33 · 2 answers · asked by ¡Jessica! 4 in Biology

What is electrical engineering?

2007-02-06 15:11:14 · 3 answers · asked by yubtub 1 in Engineering

An FM radio station broadcasts at a frequency of 104.2 MHz (1 MHz = 106 Hz, or cycles per second).
What is the wavelength of the radiation in meters ?

2007-02-06 15:10:54 · 3 answers · asked by Anonymous in Engineering

2007-02-06 15:10:31 · 2 answers · asked by dianne j 1 in Zoology

1 Given the following thermochemical equation:
2Fe2O3+3C=>4Fe+3CO2 q= -2310KJ
If a reaction has a heat change of -328KJ, what quantity of Fe2O3 in moles reacted?

2 Given the following thermochemical equation:
FeS+2HCl=>FeCl2+H2S q= -1230KJ
What is the heat change in KJ accompanying the production of 1.43moles of H2S?

3Given the following thermochemical equation:
4C2H3O2Br+3O2=>8CO+6H2O+2Br2 q= 2910KJ
What is the heat change in KJ accompanying the production of 13.8grams of H2O?

2007-02-06 15:10:27 · 1 answers · asked by Ellie 1 in Chemistry

Here are some problems that I am having problems with:

1) In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 3.84 cm. This presure is transmitted by a liqud to a second piston of radius 24.1 cm. What force must the compressed air exert in order to lift a car weighing 11500 N? answer in N

2) What air pressure will produce this force? answer in units of Pa

3) Assume the density of sea water is 1024 kg/m^3 and take the atmostpheric pressure equal to 101000 Pa.
The acceleration of gravity is 9.8 m/s^2. Calculate the pressure at an ocean depth of 1240m. Answer in unts of Pa.

4) Calculate the total force exerted on teh outside of a circular sbmarine window of a diameter 43.7 cm at this depth. answer in uits of N.


Thank you for any help!

2007-02-06 15:08:49 · 1 answers · asked by Cool_Tall_One 3 in Physics

2007-02-06 15:08:22 · 3 answers · asked by Cliff W 1 in Astronomy & Space

I had one friend try it, quit for a couple weeks, then went back for another treatment, and a couple weeks later started back smoking again. There was another who smoked for 10 years a pack a day and quit on her first treatment. Anyone had experience?

2007-02-06 15:08:02 · 4 answers · asked by serenitynow 3 in Medicine

If you can explain little bit, that would be even better
thank you

2007-02-06 15:07:33 · 4 answers · asked by Anonymous in Mathematics

OK, I get time dilation, if I travel away from earth at relativistic speeds then when I return I will have experienced less time than my twin on Earth who has grown old and died. So my question is, If I observe that the universe is 14 Billion years old, how much time has passed for the first photons in the big bang? How old would those photons think they were in Earth years if they were capable of thinking about it?

2007-02-06 15:06:41 · 8 answers · asked by Graham S 3 in Astronomy & Space

Hey, this problem was/is a tough one for me!
It one of those PEMDAS promblems... I thought I had them "down pack" but now look.
Can you do this one for me and explain it
thank you so much :)

2007-02-06 15:06:24 · 9 answers · asked by OnSomeLousyPlanet 1 in Mathematics

A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower.The period of oscillation is 9.40s. What is the height of the tower?

2007-02-06 15:06:14 · 2 answers · asked by Kitana 2 in Physics

What would happen if you had your thyroid taken out and was put on synthroid by your doctor and then you stopped taking it on your own? I know someone who has done that and hasn't taken his meds for a week and I think without it and without his thyroid he could die. Help!

2007-02-06 15:05:13 · 4 answers · asked by Vicki B 2 in Medicine

Somehow if you could show a picture ( I dont know if you even are able to) of the following :

* 2 lines that lie in a plane but do not intersect
* 3 lines that intersect in a point but do not all lie in the same place
* 2 planes that do not interesect

2007-02-06 15:04:51 · 5 answers · asked by ShakeDatLaffyTaffy 2 in Mathematics

2007-02-06 15:04:21 · 2 answers · asked by Cornelia S 1 in Botany

2007-02-06 15:04:03 · 5 answers · asked by lewis a 1 in Geography

the output of a northern gold mine has remined constant at 22 000 ounces per year. At the end of last year, the total output of the mine was 90 000 ounces of gold.

What will the total output be at the end of this year? at the end of next year?
(can you show me how you got this answer.. thank u)

2007-02-06 15:00:32 · 5 answers · asked by Anonymous in Mathematics

2007-02-06 14:59:01 · 2 answers · asked by Anonymous in Mathematics

Humans can so why can't giraffes? I have wondered this for a long time.....

2007-02-06 14:58:33 · 6 answers · asked by believer_rachel 1 in Zoology

Solve each system of equations by graphing and by substitution. which metod do you perfer and why?
ive been fighting with this question for hours. i dont no how to do it can someone please help me!!!!

Question:
2x + y = 5
2y = 2x + 1

2007-02-06 14:58:25 · 6 answers · asked by Anonymous in Mathematics

2007-02-06 14:55:49 · 5 answers · asked by x_beach_babe_o 1 in Zoology

This is driving me batty, my furnace broke and I got some carbon monoxide in the house... Just enough to give me a headache and loss of appetite and stuff. It is fixed now and the house is aired out, but the headache has been hanging on for the past several days. How long is it likely to last for? I have to insurance, just wondering.

2007-02-06 14:55:16 · 4 answers · asked by Jason 6 in Medicine

define continent

2007-02-06 14:55:09 · 10 answers · asked by Doc Manhattan 3 in Geography

2007-02-06 14:54:27 · 7 answers · asked by gingersnap 1 in Zoology

I just bought a modular home and the electic company turned on the electric today but when I got to the house the electric wasnt working , I flipped every breaker I could find and even had a neighbor come over and try but I got NOTHING . When I called the electric company back they told me it wasnt thier problem and to call a electrician but I dont have the money . Any ideas on how I could fix this or what the problem could be , we are not getting a reading on the meter but I figured its because its not getting power . I doubt it is an electrical problem because the house is only 4 years old and the last owner didnt have any problems ...........

2007-02-06 14:54:23 · 6 answers · asked by applesauce 1 in Engineering