Science & Mathematics - 17 November 2007

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how would you solve this linear equation?

-x - 2y = 3
y= 2 - 4x

2007-11-17 13:25:53 · 5 answers · asked by rigo201113 1 in Mathematics

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what can you do to save the planet?

2007-11-17 13:23:55 · 7 answers · asked by Common Sense 2 in Astronomy & Space

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can I see the Leonid Meteor Shower in Mesquite texas?

and If so, what time is best to view it?

2007-11-17 13:22:35 · 3 answers · asked by icanansweryourquestions 3 in Astronomy & Space

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how do u measure carbondioxide?please....?

in my science class, my teacher gave this really confusing HW and measuring carbondioxide is one of them(how to measure human's carbondioxide when she is breathing out). please~~~ help me. and also please tell me the good website to look. thank you sooo much.

2007-11-17 13:22:20 · 2 answers · asked by . 4 in Botany

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What is the oxidation number of C in KHCO3?

2007-11-17 13:19:44 · 4 answers · asked by GoingChemCrazy 2 in Chemistry

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What causes mold on wheat and white bread?

2007-11-17 13:18:58 · 6 answers · asked by Anna F 1 in Botany

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what are we to do when all our glaciers have melted?

you mean we can go to the moon and beyond and we can't measure their receding dimensions? you seem to be able to measure planet seperation quite well!.........people is someone fibing a little here our what?..........our the well educated and the sientists already know and we can't have a panic i suppose and maybe the planet will go to less land .......inform me please......later bye......our are we ok with out glaciers?....some one's has this answer now i believe........

2007-11-17 13:13:33 · 19 answers · asked by Anonymous in Astronomy & Space

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Which one of these Men have a chance of becoming the next Einstein?

Garrett Lisi
http://www.telegraph.co.uk/earth/main.jhtml?view=DETAILS&grid=&xml=/earth/2007/11/14/scisurf114.xml

Edward Witten
http://www.pbs.org/wgbh/nova/elegant/view-witten.html

I admire both, but I really like Witten. Which one of them have a chance of becoming the next Einstein in your opinion?

2007-11-17 13:12:26 · 4 answers · asked by Anonymous in Other - Science

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Can the Leonid Meteor Shower be seen in central florida?

?

2007-11-17 13:09:05 · 2 answers · asked by Anonymous in Astronomy & Space

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what makes bicarb and citric acid react ?

2007-11-17 13:08:59 · 6 answers · asked by Anonymous in Chemistry

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properties. of bonds in chemistry?

ionic, ionic compounds, covalent, covalent compounds, metallic, metallic compounds

and also how do you identify a covalent network

2007-11-17 13:03:27 · 1 answers · asked by Anonymous in Chemistry

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physics force and work?

a flywheel of radius .58m and moment of inertia of 17kg*m^2 rotates initially at a rate of 4.5 rev/sec. If a force of 4.8N is applied tangentially to the flywheel to slow it down, how much work will be done by this force in bringing the flywheel to a stop?

2007-11-17 12:57:33 · 1 answers · asked by Joanna H 1 in Physics

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How does meiosis lead to genetic variability within a population?

Use S. fimicola as an example.

Please help!!!!!!!! >.<

2007-11-17 12:57:17 · 5 answers · asked by hmm... 1 in Biology

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moles of water??

ok guys, we did a calorimetry kind of thing lab and we're supposed to measure the heat of neutralization.

In this equation:
NaOH + HCl ---> NaCl + H2O

first we have to find moles of water right? cuz the heat of neut is kj/mol of water formed.

What i have is: 50 mL of 2 M NaOH, and 40 mL of 2 M HCl.
ok so my question is, how do i calculate the number of moles of water??? is it the same as that of HCl?? plz any clarifications would be greatly appreciated!!

2007-11-17 12:52:50 · 2 answers · asked by Curious 1 in Chemistry

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Can you see a comet through the clouds?

ok well i was walking out sid and its overcast and i looked up and thout i saw somthing like a cloud glowing and moving and as you know homers comet is is circling the planet i thout it might be the comet please relpy

2007-11-17 12:51:19 · 8 answers · asked by az_burro_lover 2 in Astronomy & Space

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is Cali and NY safe from natural disasters?

I want to be an actor or even a film maker

and i think those states are best for those kind of jobs but are they safe?

or what cities in them are safe?

2007-11-17 12:51:13 · 14 answers · asked by Jay 3 in Weather

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PLEASE HELP 1.75e-5={(x)(.0040+x)}/(0.002-x)?

Please help me solve for x

2007-11-17 12:49:57 · 3 answers · asked by Paul G 1 in Engineering

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I need help on so gravimetric analysis questions?

1.Why do you add HCl to the mixture of BaCl2 and Na2SO4?

2.What are the factors that favour the formation of BaSO4 crystals?

3.How do you check the purity of BaSO4 crystals formed?

4.How do you improve the purity of BaSO4?

2007-11-17 12:49:29 · 1 answers · asked by kiko 1 in Chemistry

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if someone to attack you from out of the blue what would you do and if you don't have a cell what are you to

do

2007-11-17 12:48:42 · 9 answers · asked by Anonymous in Biology

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33 out of 4300 people have autosomal recessive disease.What is allele frequency for each allele?

Lister's Disease is an autosomal recessive disease and was studied in the Inuit population of Canada. It was found that 33 individuals have the disease of the 4300 individuals studied. What is the allele frequency in this population for each allele?
What is the frequency of carriers of the disease in this population?

2007-11-17 12:47:37 · 3 answers · asked by luvbug 1 in Biology

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work problem?

a flight attendant pulls her 70.0 N flight bag a distance of 253m along a level airport floor at constant velocity. The force she exerts is 40.0 N at the angle of 52.0 degree above the horizontal.Find the flollowing:
a)the work she does on the flight bag.
b.)the work done by the force of friction on the flight bag.
c.)the coefficient of kinetic friction between the flight bag and the floor.

2007-11-17 12:45:02 · 1 answers · asked by 832 1 in Physics

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the differnce between stained and unstained cell please i really need help?

in school my son is doing a project can you please tell me the diffrence between the stained and unstained on the animal cells and why do you think biologists use stains

2007-11-17 12:44:16 · 4 answers · asked by randa mahmoud h 1 in Biology

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Are Spaceships in the Bible?

post some things so I can see what you beleive and visit my site at www.ancient-contact.blogpsot.com

2007-11-17 12:43:46 · 8 answers · asked by Sirius 2 in Astronomy & Space

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i would like some one to agree that there is a difference in transparent and translucent. What is it?

transparent is when u can see completely through and translucent is when u can only partialy see through or can't see through clearly right?

2007-11-17 12:43:00 · 3 answers · asked by mitodo_amor 2 in Physics

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Feminine question?

Does anyone know if it is safe to douche with Hydrogen Peroxide? I've heard it's suppose to balance PH levels and it contains Acidophilous--the same bacteria in unpasteurized plain yogurt.

2007-11-17 12:40:12 · 5 answers · asked by Anonymous in Medicine

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