Science & Mathematics - 23 November 2007

2007-11-23 18:55:53 · 3 answers · asked by Justin Reyes 5 in Mathematics

Solve by using the quadratic formula.

x^2=7x+6

2007-11-23 18:54:13 · 6 answers · asked by babby_bear30_99 1 in Mathematics

If 1, w and v are the cube roots of unity prove that:
(a) w = conjugate v = v^2
(b) w + v = -1
(c) (w)(v) = 1

thanks

2007-11-23 18:44:49 · 4 answers · asked by BeyondLimitz 1 in Mathematics

2007-11-23 18:42:08 · 5 answers · asked by Anonymous in Physics

2007-11-23 18:35:53 · 1 answers · asked by Debasmita 1 in Earth Sciences & Geology

Also, what is meant by frequency of alternating current?

2007-11-23 18:15:32 · 8 answers · asked by Akilesh - Internet Undertaker 7 in Physics

I am thinking about buying a aluminum flute case, and I am wondering if that is a strudy material for a flute case?

http://cgi.ebay.com/ALUMINUM-FLUTE-CASE-BRAND-NEW-C-B-foot-available_W0QQitemZ260184988573QQihZ016QQcategoryZ10183QQtcZphotoQQcmdZViewItem

here is the flute if you think it is a good choice of a new flute case, because my flute case is almost broken.

2007-11-23 18:14:37 · 2 answers · asked by I like cheese girl XP™ 2 in Earth Sciences & Geology

If aliens are in a galaxy say 10 light years away,and they have a device like the microscope ,would they still see man in the stone age, coz the light that they get would have originated from the earth 10 light years ago?

2007-11-23 18:13:12 · 9 answers · asked by Anonymous in Astronomy & Space

I'm just curious if there's anyone else who experiences this. To be honest, I've always been 'sensitive' so It really doesn't scare me.

Sometimes, at night, I feel someone sitting on the end of my bed. You know that feeling when the mattress compresses? It's very distinct and no, I'm not asleep. I don't have any pets in the room at night, so I know it's not that.

I don't get a bad feeling, so I imagine it's either a guardian spirit, or perhaps one of my recently deceased family members. Sometimes I'll even acknowledge them and say goodnight.

I grew up in a house full of spirits, so I've experienced stuff like this since I was a child (as did my late Mother). I'm just wondering if anyone else has this happen.

Also, any idea's what it might mean. Would this likely be a guardian spirit, or an ancestor. Do you think they're trying to tell me something, or just want me to know they're there?

2007-11-23 18:11:47 · 37 answers · asked by lapis 4 in Paranormal Phenomena

2007-11-23 18:05:02 · 7 answers · asked by macon 1 in Physics

1) A freshly brewed cup of coffee has temperature 95degrees in a 20degree room. When its temperature is 70degrees, it is cooling at a rate of 1degree per minute. When does this occur?

2) If $500 is borrowed at 14% interest, find the amounts due at the end of 2 years if the interest is compounded (i) annually, (ii) quarterly, (iii) monthly, (iv) daily, (v) hourly, and (vi) continuously.

show work plz..thanks! =)

2007-11-23 18:02:34 · 3 answers · asked by Anonymous in Mathematics

2007-11-23 18:01:01 · 2 answers · asked by Anonymous in Physics

I want to know it. Because I found some lime butterfly eggs in my citrus plants. And How would I know if they are ready to hatch. What color are they if they are ready to hatch?. How long will it take them to hatch?

2007-11-23 17:58:49 · 1 answers · asked by jake 1 in Zoology

2007-11-23 17:55:49 · 10 answers · asked by jeet 1 in Earth Sciences & Geology

i want to know the complete steps of finding square root of any number withot the help of calculator.

2007-11-23 17:53:11 · 11 answers · asked by momo 1 in Mathematics

anyone else see the ring around the moon?

what exactly is it?

and if you dont see it, the moon is amazingly bright and then theres just a big gap, then a bright ring around it.

2007-11-23 17:52:45 · 3 answers · asked by kb 2 in Astronomy & Space

2007-11-23 17:51:05 · 8 answers · asked by Anonymous in Mathematics

1. C2H4(g) + O3(g) -> CH3CHO(g) + O2
in KJ

2. O3(g) + NO(g)-> NO2 (g) + O2(g)
in KJ

3. SO3(g) + H2O(l) -> H2SO4(aq)
in KJ

4. 2NO(g) + O2(g)-> 2NO2(g)
inKJ

2007-11-23 17:48:55 · 2 answers · asked by Anonymous in Chemistry

How do they affect climate on land?

2007-11-23 17:47:55 · 1 answers · asked by Miss Curiosity 1 in Earth Sciences & Geology

How fast do rain drops fall untill it hits the ground?

2007-11-23 17:44:42 · 5 answers · asked by minx7♪♫ 3 in Weather

2N2(g) + 6H2O(g) -> 3O2(g) + 4NH3(g)

you are given the following data:
NH3(g) -> 1/2N2(g) + 3/2H2(g) ΔH= 46KJ
2H2(g) + O2(g)-> 2H2O(g) ΔH= -484 KJ

2007-11-23 17:42:30 · 3 answers · asked by Anonymous in Chemistry

2007-11-23 17:41:53 · 3 answers · asked by dt 2 in Other - Science

Im usually good at math but its boring now and im hating it...answer this!

Add Arithmetic symbols on the left of the equal signs , between the numbers to make the equation true.

1 2 3 4 5 6 7 8 9=100

2007-11-23 17:38:58 · 4 answers · asked by i like saying hi 6 in Mathematics

I'm considering 3 alternatives. 1. Steroid injections for as long as they'll work 2. Spinal Fusion 3. Disk replacement

Can anyone give me some really good points on the pros and cons of each decision? I'm really all over the place in what to decide. I'm afraid of steroids and the quick fix and brittle bones but I'm also afraid of surgery. So which is the lesser of 2 evils?

2007-11-23 17:38:07 · 2 answers · asked by Angels Serenity 4 in Medicine

I'm doing a project for physics and I want to talk about color blindness. I need to find out how the glasses are made,or I need to find some drawings of them ( how they change the spectrum of colors ). I found a website '' http://www.linkgrinder.com/Patents/Method_for_desi_7284856.html '' and at the end it explains something by pictures ....I can't find any picture there, if you can find some, please tell me.

Thanks

2007-11-23 17:37:08 · 2 answers · asked by Gabriela I 1 in Physics

2007-11-23 17:31:59 · 3 answers · asked by Anonymous in Mathematics

Why don't people believe in other intelligent lifeforms? With an estimated 10^11 planets in our galaxy and 10^11 galaxies in the universe, is the probability not favoring the inhabitance of other species? Is it that people don't understand these numbers, or is it their natural ignorance? Perhaps their religious beliefs? Who says God wouldn't create life on other planets anyway? No one can. Now I'm not saying there is proof of aliens, but one cannot say there is proof that they don't exist. The fact remains that the odds are favorable. Honestly, it's the 21st century now, and I think people need to wake up, but unfortunately I think some are just too ignorant. What do you guys think on this matter?

2007-11-23 17:24:42 · 16 answers · asked by de4th 4 in Astronomy & Space

2007-11-23 17:20:25 · 8 answers · asked by sureshbabusintst 1 in Engineering

2007-11-23 17:07:16 · 6 answers · asked by Anonymous in Botany

Writing report. On Iceland volcano. Please help! Or Provide website.
Thankyou

2007-11-23 17:06:26 · 3 answers · asked by takenbutyouwantme 1 in Earth Sciences & Geology