Science & Mathematics - 24 November 2006

I'm doing a bio project and i need a way to show diffusion.
I already know about the perfume experiment but i want something different. I have to be able to do it infront of the class for about 5-10 minutes. Please help?

2006-11-24 14:25:30 · 5 answers · asked by Colorguardgrl 1 in Biology

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im suppose to divide using long division...?

But i just need an answer, (8x^2+4x^3-19-11x) / [divided by] (2x+5)

2006-11-24 14:19:50 · 6 answers · asked by Anonymous in Mathematics

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Which part possesses a microtubular structure similar to a basal body?

A)centriole
B)lysosomes
C)nucleolus
D)peroxisome
E)ribosome

2006-11-24 14:18:52 · 3 answers · asked by Anonymous in Biology

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how for is the nearest point from russia to the us?

2006-11-24 14:17:42 · 12 answers · asked by paul h 1 in Geography

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a 3 digit number my tens digit is 5 more than my ones digitmy hundreds digit is eight less than my tens find?

i am a

2006-11-24 14:17:39 · 6 answers · asked by sneha r 2 in Mathematics

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Did the stegosaurus lay eggs?

If so, how many?

2006-11-24 14:14:24 · 2 answers · asked by Kylie M 1 in Zoology

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simplify....?

x^2-4x-12 /[divided by] 5x^2-180. Anyone feel like they have the answer and or can tell me how to do it ?

2006-11-24 14:10:23 · 6 answers · asked by Anonymous in Mathematics

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I have a cube the surfave area of each side is 1 I have to find the diagonal?

2006-11-24 14:10:13 · 5 answers · asked by Anonymous in Mathematics

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is my space better than everything?

my space is better

2006-11-24 14:07:42 · 8 answers · asked by Helen C 1 in Physics

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AUG and GUG are often called the START codons. Why?

2006-11-24 14:05:35 · 5 answers · asked by surina g 1 in Botany

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If you are smart, then answer this job interview question?

If you could remove any of the 50 U.S. states, which would it be?

2006-11-24 14:05:08 · 22 answers · asked by Anonymous in Geography

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help with this math polygon graphing problem?

ok i have vertex A=(0,-5), B=(1,9)C=(8,9) and D=(-3,-1), what would the coordinates for each vertex be after is is rotated 90 degree about the origin,,

help is really appreciated, thanks.

2006-11-24 14:04:18 · 5 answers · asked by BLUEEEE 1 in Mathematics

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Combined gas law?

57) A compressedd air-tank carried by scuba divers has a volume of 8.00 L and a pressure of 140 atm at 20'C. What is the volume of air in the tank at 0'C and 1.00 atm pressure (STP) ?

60) A sample of oxygen produced in a laboratory experiment had a volume of 590 mL at a pressure of 775 mm Hg and a temp of 352 K. What is the volume of this sample at 25 'C and 800.0 mm Hg pressure?

Avogadro's Law & Standard Molat Volume

65) How many moles of gas are in a volume of 48.6 L at STP?

68) What is the mass of CH4 in a sample that occupies a volume of 16.5 L at STP ?

69) Assume that u have 1.75 g. of deadly gas hydrogen cyanide, HCN. What is the volume of the gas at STP ?

Ideal Gas Law

76) If 2.3 moles of He has a volume of 0.15 L at 294 K, what is its pressure in atm?

78) If 15.0 g of CO2 gas has a volume of 0.30 L at 310 K, what is its pressure in mm Hg?

2006-11-24 13:59:54 · 6 answers · asked by femylatina 1 in Chemistry

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Anti time?And caan we really need to create the own universe, as I read in New Scientist?

I have idea about it but l not know how to explain it. It is too difficult for 18 years old boy. As we know know, Time is not a absolute.

If yahoo give me some space for me to skatch my graph and............. mmm....

2006-11-24 13:59:52 · 9 answers · asked by Anonymous in Astronomy & Space

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why do you say that our life span is increasing? there are so many deaths ooccuring in n early age because of?

sickness, my mothers grandmother died at the age of 104.....so im saying that the lifespan is decreasing......???? im making a research study so please help me....

2006-11-24 13:59:29 · 7 answers · asked by marijoe n 1 in Biology

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where is the solar system located within the milky way?

2006-11-24 13:56:35 · 10 answers · asked by Scarlett 1 in Astronomy & Space

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Use the following numbers to give a total of 24. 1, 3, 4, 6 You can only use each number once?

you can multiply, subtract, add, divide etc.

2006-11-24 13:51:01 · 8 answers · asked by mojo jojo 1 in Mathematics

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When was the word robot....?

first introduced? How is Issac Asimov related to robots? Describe mathematically what is a robot and discuss the notion of configuration space. Provide examples please...and sources

2006-11-24 13:48:31 · 3 answers · asked by Daniel Y 1 in Engineering

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what is " a " in this limit?Lim ((x-a)^2)/(1+Cos((pi/a)*x) x--->a?

what is " a " in this limit?
Lim ((x-a)^2)/(1+Cos((pi/a)*x) when x---->a

2006-11-24 13:47:30 · 5 answers · asked by Arman Hassanpour 1 in Mathematics

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A 0.0100 M solution of nickel II is buffered at PH 8.0 with a non complexing (alphaNi=1.0) buffer and titrated

with 0.0100 M EDTA.Calculate pNi at (a)50% (b)100% (c)200% titration

logKNi=18.6
alphaY=10^-2.2

2006-11-24 13:47:30 · 1 answers · asked by Anonymous in Chemistry

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ill pay for a love or return a lover spell?

i was with a guy for almost 4 yes i love hime i want him back if u know a love or return a lover spell i will pay big money given it works plz no smart butts this is serious u can i.m or email me at imjustobossy@yahoo.com if u know anyway again please no smart butts t.y

2006-11-24 13:47:16 · 6 answers · asked by Anonymous in Physics

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Help with this question please!?

A car accelerates uniformly from rest and covers a distance of 65 m in 5.7s. If the diameter of the wheel is 40cm.
1. Find angular acceleration of the wheel. Answer in rad/s^2
2. Find the final angular velocity of one of the car's wheels. Answer in rad/s.
3. Find total number of rotation of the wheel.

I left my book at school, and i dont have any of the formulas to help me. Any help would be greatly appreciated. Thank you in advance.

2006-11-24 13:47:10 · 2 answers · asked by polo_05_polo 1 in Physics

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Estimate the force a person must exert on a string?

Estimate the force a person must exert on a string attached to a 0.200 kg ball to make the ball revolve in a horizontal circle of radious 0.600 m. The ball makes 1.00 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of FT, and the angle it makes with the horizontal. [Hint: Set the horizontal component of FT equal to maR; also, since there is no vertical motion, what can you say about the vertical component of FT?]

I have solved this question and got the answers 4.74 or 4.76, both or which are wrong. I can't seem to find an error in my solution, but if you can please inform me. Thanks

2006-11-24 13:44:46 · 1 answers · asked by hpbasketball11 1 in Physics

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what are the steps in which a motor neuron sends an electrical signal (impulse) down the axon?

and how does the signal travel across a synapse to another neuron cell?

2006-11-24 13:40:03 · 3 answers · asked by Anonymous in Biology

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help!!!!!!!!!!!?

i need alot of help becuase my science project is due this tuesday i have not picked a project. so please help mee!!!!!!!!!!!!

2006-11-24 13:39:06 · 7 answers · asked by Helen C 1 in Geography