Science & Mathematics - 19 November 2007

I've altered the equation of an ellipse to make it easier to differentiate: (b^2)(x^2) + (a^2)(y^2) = (a^2)(b^2)

From here, I must use implicit differentiation so that I can find the slope of the tangent line on the ellipse. I need to see it step by step so that I can learn how to do this correctly. Thanks.

2007-11-19 16:32:35 · 1 answers · asked by dark aura 2 in Mathematics

2007-11-19 16:31:47 · 3 answers · asked by red_devil07 2 in Medicine

Cos it's bloody freezing here!

2007-11-19 16:30:17 · 17 answers · asked by Andrew1968 5 in Weather

A party store ordered 50 cases of balloons. The number of cases in stock t months after the order arrives is given by the equation
n(t)= 50e^-0.3t

How many cases are in stock when the order arrives?
How many cases are in stock 6 months after the order arrives?

2007-11-19 16:29:03 · 2 answers · asked by Nidhi M 1 in Mathematics

Does anybody know the name of the machine that spins the amniotic fluid to compact the fetal cells???
Also, does anyone know what will happen to that compacted cells???

2007-11-19 16:28:39 · 1 answers · asked by hmm... 1 in Biology

2007-11-19 16:25:41 · 7 answers · asked by Anonymous in Biology

It's a new planet that was discovered about 7 months ago. It is an extrasolar planet (meaning it is not in our solar system.) It, however, does orbit a smaller star than our sun but its small distance makes it a place just like earth, habitable. It's temperature is thought to be VERY close to that of our planet. The only problem is that it's 20 light years away from us which is impossible to get to, at least for now. You guys think we'll ever get there? And you think there's intelligent life on it?!!

2007-11-19 16:23:33 · 5 answers · asked by The Beast from the Middle East 5 in Astronomy & Space

2007-11-19 16:21:53 · 10 answers · asked by Floyd O 1 in Mathematics

6x+4y=14
2x+8y=21

2007-11-19 16:20:43 · 3 answers · asked by ninnis 1 in Mathematics

Down in a cave below the surface of the earth there is:

a) more gravity than at the earth's surface
b) less gravity than at the earth's surface
c) the same gravity as at the surface

Assume the earth's density is the same all the way through. Of course it isn't. But simplistic idealized situations must be thoroughly understood before details can be appreciated.

2007-11-19 16:20:39 · 6 answers · asked by ? 6 in Physics

The weight (w) of an object in pounds is related to its distance (d) from the center of the earth by the equation: w= 320 over (d)cubed or 320
D2 Where (d) is in thousands of miles. How much does the object weigh at sea level which is about 4,000 miles form the center of the earth?

2007-11-19 16:19:11 · 3 answers · asked by sistermoon 4 in Mathematics

2007-11-19 16:18:52 · 15 answers · asked by VINCENT B 1 in Astronomy & Space

(the earths atmosphere to be specific)

2007-11-19 16:17:31 · 7 answers · asked by Anonymous in Astronomy & Space

2007-11-19 16:17:28 · 5 answers · asked by navarroben 1 in Biology

I have this equation here and i am completely stuck. Any tip on soliving this problem?

1+(1/2).... 1+(3/4) 1+ (7/8) 1+ (15/16)

2007-11-19 16:14:29 · 3 answers · asked by linh 1 in Mathematics

Could you show me the steps? I really don't understand how to do it.

And I don't think there's supposed to be a set answer like 5 or 3.6533 I think it's going to be something in terms of tan or cos or something... and something I forgot to mention is that x was a substitute for theta

2007-11-19 16:12:32 · 1 answers · asked by annette 3 in Mathematics

I'm reading about synapsis and tetrads in Prophase I, and in the picture it has two sister chromatids, and I don't understand how there are 4 total chromosomes, so that when in Anaphase, splitting occurs in meiosis, each new cell has one chromosome from each homologous pair. Why wouldn't it have two? I know tetra means 4, but I don't understand how this works. Isn't a homologous chromosome singular?

2007-11-19 16:09:36 · 7 answers · asked by Anonymous in Biology

well.. i am making a comic book :) about tis girl who has a lightning power.. i wanted to know wat lightning is scared of so i can make the bad guys(vilans) stronger.... (water, rain, ground...etc.)

2007-11-19 16:09:25 · 4 answers · asked by Anonymous in Weather

1. p% of $q=
A)$pq
B)$ ( p+q/100)
C)$100pq
D)$ pq/100

2.A pen is bought for $69.50 and sold for $89.50. What is the gain per
cent?

3.The price of a television set is reduced by 18% to $1722. What was the original price?

2007-11-19 16:08:01 · 3 answers · asked by Anonymous in Mathematics

Can someone please give me the balanced equation for these compounds.

2007-11-19 16:07:02 · 4 answers · asked by I M Alexis 1 in Chemistry

2007-11-19 16:06:18 · 2 answers · asked by vince 1 in Chemistry

2007-11-19 16:06:07 · 2 answers · asked by kat 2 in Biology

what is momentum?

2007-11-19 16:03:55 · 5 answers · asked by Anonymous in Physics

A 50kg pilot comes out of a vertical dive in a circular arc such that at the bottom of the arc her upward acceleration is 8.5g.

What is the magnitude of the force exerted by the airplane seat on the pilot at the bottom of the arc?

If the speed of the plane is 345 km/h, what is the radius of the circular arc?

You don't have to do all the math, I just have no idea where to even begin!

If you could help me out, it would be greatly appreciated!

Thanks!

2007-11-19 16:02:23 · 2 answers · asked by Jackie 2 in Physics

here is the grid
1 _ 2
5 4 _
_ 7 3

you're supposed to fill in the numbers 6, 8, 9

2007-11-19 16:01:17 · 1 answers · asked by Anonymous in Mathematics

2007-11-19 16:01:07 · 4 answers · asked by puentesguitar 1 in Mathematics

The process of translation. What are the roles of mRNA, tRNA, and how and the process ensures the proper sequence of amino acids in a finished protein.

2007-11-19 15:58:33 · 4 answers · asked by flower 2 in Biology

Compare and contrast the events that occur during prophase of meiosis I and prophase of mitosis and anaphase I of meiosis and anaphase of mitosis.

2007-11-19 15:56:18 · 4 answers · asked by flower 2 in Biology

2007-11-19 15:56:08 · 11 answers · asked by Spade 2 in Mathematics

Where the following pathways occur within the cell or specifically where in an organelle
Glycolysis
Transition Step
Krebs Cycle
Electron Transport Chain
Alcohol Fermentation
Lactic Acid Formation

2007-11-19 15:55:16 · 4 answers · asked by flower 2 in Biology