Science & Mathematics - 21 November 2006

i have to determine whether H-F is polar or nonpolar.......how do i know that? people say the electronegativity diffrence but how do i do that?

also whats Br-Br....nonpolar?polar?

thank u,
confused student

2006-11-21 10:02:16 · 5 answers · asked by Curious10106 2 in Chemistry

If a chicken and a half can lay an egg and a half in a day and a half, how many eggs can six chickens lay in four days?

2006-11-21 09:57:51 · 4 answers · asked by Flyboy 6 in Mathematics

We're talking about the 11th dimension's unit self.

2006-11-21 09:54:54 · 1 answers · asked by merviedz trespassers 3 in Physics

i have to right a report with a thesis statment about elephatns what should it be?

2006-11-21 09:54:11 · 6 answers · asked by clefspeare 1 in Zoology

for science

2006-11-21 09:54:05 · 11 answers · asked by Anonymous in Other - Science

in a polar molecule (for example H-Br) how do you indicate the direction of the resulting dipole?

i know the answer is either --> or <-- but idk HOW to get it, how do u know it points to the right? or the left?
please, and thank you a lot!

2006-11-21 09:53:46 · 2 answers · asked by Curious10106 2 in Chemistry

Hey what i need help with factoring...?
hey what would be the answer to y4+y2-2
all the numbers after the y's are variables except the last 2 thx for the help

2006-11-21 09:48:13 · 7 answers · asked by muminka12 2 in Mathematics

And will it float if I'm cooking a roast, and playing the banjo?

2006-11-21 09:47:08 · 2 answers · asked by FRANKFUSS 6 in Engineering

2006-11-21 09:46:53 · 2 answers · asked by jai_patel91 1 in Chemistry

5 polyps were removed during my colonoscopy and since then, I can't seem to hold my bowel. I get the urge and i have to sprint to the restroom barely making it in time. As many as 7 BM's in the morning - watery with yellow (bile?). Is this normal?

2006-11-21 09:46:36 · 4 answers · asked by Anonymous in Medicine

2006-11-21 09:42:43 · 5 answers · asked by Amanda1 1 in Biology

Skunks live all over the continental united States...but i have never seen one! Not even as road kill. I know they are noctornal but I have seen most noctornal animals that live in my area at some point. How come I never see skunks? Has anyone ever seen one in the wild? (not that I'd want to see one...Im just wondering)

2006-11-21 09:42:12 · 11 answers · asked by Sara 4 in Zoology

Also why is chlorphyll necesssary for photosynthesis?
I couldnot answer this question for my cousin to good.......I told her photo means light and synthesis means.........a plant needs light for photosynthesis.

2006-11-21 09:41:40 · 2 answers · asked by ghettoco 1 in Botany

2006-11-21 09:38:58 · 14 answers · asked by jessica loves u all 1 in Weather

2006-11-21 09:38:26 · 11 answers · asked by Anonymous in Zoology

Enez recently invested $5000, part at 6.5% annual interest and the rest at 7%. How much was invested at each rate if her annual income from both investments was $340?

2006-11-21 09:38:03 · 2 answers · asked by mr.murphy76 1 in Mathematics

2006-11-21 09:36:44 · 27 answers · asked by jessica loves u all 1 in Geography

2006-11-21 09:35:51 · 12 answers · asked by jessica loves u all 1 in Geography

I asked:

-WHY DOES AN INFLATED BALLOON MOVE WHEN THE AIR ESCAPES.

I concluded or summarized wut you guys answered:
(Newton’s Third Law of Motion), for every action there is an equal and opposite reaction i.e. the air goes one way, the balloon goes the other. The air inside the balloon is exerting pressure on the outside of the balloon. When the air escapes, that pressure is concentrated in one direction. The moving air near the opening strengthens pressure on the current of air, and so it pushes the balloon forward.


BUT, if I make a rocket out of a balloon and attack it to a straw and put the straw thru a string (so it can move on the string as if it was going to mars or wherever).. Would the rocket action still occur if there were no surronding air?

I think the air does affect it... am i wrong why?if im right .. aight? why?

2006-11-21 09:33:03 · 5 answers · asked by BeatyIsInTheEyesOfTheBeholder 1 in Chemistry

what is the rule for this sequence?:
2, 4, 10, 28, 82...
Then what are the two numbers after?
And also what is the 10th term?

2006-11-21 09:32:26 · 7 answers · asked by Free hugs? x 2 in Mathematics

2006-11-21 09:31:53 · 6 answers · asked by Jessica 2 in Astronomy & Space

2006-11-21 09:30:55 · 8 answers · asked by Me<3JB 2 in Chemistry

2006-11-21 09:30:51 · 5 answers · asked by azera221 4 in Physics

are these right:
i.Independent Variable: Temperature ( An independent variable is what is being measured/recorded.)
ii.Dependent Variable: Time (A dependent variable is what changes in the experiment.)

2006-11-21 09:29:01 · 2 answers · asked by Me<3JB 2 in Chemistry

And why?

2006-11-21 09:26:50 · 5 answers · asked by ♥ 6 in Chemistry

When sunlight passes through our atmosphere, the water droplets and other things in the air
diffuse the sunlight. Everything in the air acts like a prism. If you notice the color
spectrum, blue does have the shortest wavelength than red so therefore it does not scatter
or disperse, it comes through and that is what we see. The colors toward the reds have a
longer wavelength and they diffuse or scatter easier than blue, more atmosphere like at
sunrise and sunset gives the reds as the short wavelenghts are bounced away from our eyes.

2006-11-21 09:24:58 · 5 answers · asked by Jake T 1 in Earth Sciences & Geology

2006-11-21 09:24:55 · 1 answers · asked by calypsocaper 2 in Zoology

I got y'= e^cosx - sin(e^x). Is this wrong? Please show a lot of work.

2006-11-21 09:22:42 · 3 answers · asked by Anonymous in Mathematics

how much time is needed for jupiter to revolve around the sun

2006-11-21 09:20:08 · 2 answers · asked by TANISHA D 1 in Astronomy & Space

For the past 2 months i have felt very spacey or a clousyness in my head 24/7. I have been to many doctors and had many tests done. The back of may head and my neck ach alot and sometimes my head feels funny. Now for the past few days my nose and sometimes my lips and chin feel numb or tingly. Does anyone know if a neurologist would be a good doctor to go for these problems. I have had a CAT scan, stress test and blood work and it all somes back fine. The only thing that came back is that I have neck spasms but i know they can't be causing all these problems. Everyday I feel like **** and i don't know what else to do. I think my next step is going to see a neurologist. Did anyone ever feel the same way? And i only 21 thats what scares me.

2006-11-21 09:17:45 · 2 answers · asked by Tara W 1 in Other - Science