Science & Mathematics - 30 September 2007

I saw an article and a patent for a new and revolutionary solar panel last year, with promises that they will be on the market soon. Has anyone heard anything more about these solar panels?

Article:
http://www.int.iol.co.za/index.php?set_id=1&click_id=116&art_id=vn20060211110132138C184427

Patent:
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=WO2005017979&F=0&QPN=WO2005017979

2007-09-30 04:06:14 · 4 answers · asked by Matthew. 4 in Engineering

[Hint: Differentiate both sides of the equation h(x)*g(x)=f(x) and solve for h'(x).]

2007-09-30 04:00:36 · 2 answers · asked by Deutschjoe 3 in Mathematics

A 4.15 kg rabbit is on top of a 5.23 kg box. A horizontal force of at least 12.1 N must be applied to the rabbit to cause him to slip on the box (which is held stationary). If the rabbit-box system is placed on a frictionless floor, what is the maximum horizontal force that can be applied to the box so that the rabbit and box move together (ie. the rabbit doesn't slip). Any help would be appreciated. Thanks

2007-09-30 03:54:02 · 1 answers · asked by Fredrick J 2 in Physics

2007-09-30 03:52:10 · 2 answers · asked by Terri L 2 in Biology

Find all values of x at which the tangent line to the given curve satisfies the stated property.

I know to use the product rule to find F'(x), but then do I solve the numerator for x??? I just don't understand the question, maybe someone can explain... thanks

2007-09-30 03:51:35 · 2 answers · asked by Deutschjoe 3 in Mathematics

2007-09-30 03:51:20 · 2 answers · asked by Terri L 2 in Biology

2007-09-30 03:50:32 · 2 answers · asked by Terri L 2 in Biology

2007-09-30 03:49:44 · 2 answers · asked by Terri L 2 in Biology

Find N so that NM = I . How do i create an equation to find the matrix N?

the matrix of M is
1 2 0
2 1 0
0 2 1

From a previous question, i've found the matrix of N which is
0 4 0
0 0 4
4 0 0

2007-09-30 03:49:29 · 1 answers · asked by aMused 2 in Mathematics

2007-09-30 03:45:29 · 9 answers · asked by serge 1 in Geography

normally we design the beam on normal temperature with IS-456, i want to design beam above normal temperature...but our code not tell that....any help me to design such a beam

2007-09-30 03:43:20 · 2 answers · asked by sakthi v 2 in Engineering

Find the limit

lim 2 - x / (x - 1)^2
x---->1

In words: Find the limit of 2 minus x divided by x minus 1 squared, as x approaches 1.

2007-09-30 03:35:41 · 2 answers · asked by plastickfourk 1 in Mathematics

was was the space shuttle's name that got on fire
and the astronouts couldn't get out and were trapped and died in the fire???

2007-09-30 03:35:09 · 4 answers · asked by . 1 in Astronomy & Space

A 30 kg child slides down a playground slide from a height of 1.5 m above the bottom of the slide. If the child's speed at the bottom is 3.1 m/s , what is the work done by the nonconservative forces?
Please show me step-by-step thanks
Thanks

2007-09-30 03:33:14 · 2 answers · asked by Anonymous in Mathematics

I do not know how to factorize this in the slightest

2007-09-30 03:33:09 · 3 answers · asked by Ar J 2 in Mathematics

Why is the mesosphere the coldest part of the atmosphere? I really need help answering this. Please don't answer if you don't know the answer.

-Thank you

2007-09-30 03:32:02 · 2 answers · asked by Anonymous in Earth Sciences & Geology

plZ,explain with mathematical form.also give suitable example

2007-09-30 03:28:32 · 3 answers · asked by Abhishek 1 in Physics

A 1500 kg car is moving with a speed of 25 m/s. How much work is required to stop the car?

Thanks

2007-09-30 03:26:02 · 2 answers · asked by Anonymous in Physics

y=? The answer should be in slope intercept form.... y=mx+b

2007-09-30 03:21:02 · 2 answers · asked by eclipsegt_01_03 2 in Mathematics

What type of reaction is is when

aq + g = aq ?

2007-09-30 02:55:49 · 4 answers · asked by Perry 4 in Chemistry

For instance, if i am standing one corner and someone else is standing like 2 feet away from me, is the gravity on both of us different?

2007-09-30 02:51:50 · 7 answers · asked by luvalwayz_divya 1 in Astronomy & Space

2007-09-30 02:50:35 · 11 answers · asked by J L 1 in Astronomy & Space

2007-09-30 02:45:44 · 6 answers · asked by dbarr96321 2 in Astronomy & Space

7/2y+17/2=1/2y-1/2

2007-09-30 02:36:31 · 12 answers · asked by SweetMelissa990 1 in Mathematics

Teacher's please help

2007-09-30 02:35:50 · 4 answers · asked by Terri L 2 in Biology

2007-09-30 02:35:31 · 3 answers · asked by Gillbates 2 in Mathematics

10 points

2007-09-30 02:34:31 · 2 answers · asked by Terri L 2 in Biology

Put as basic as possible without any form of maths, what would the answer be, apart from them having different names.

2007-09-30 02:15:11 · 2 answers · asked by Michelino 4 in Physics

2007-09-30 02:09:00 · 2 answers · asked by crazykarma_y2k 2 in Biology

this sounds crazy but i wanna get in touch with the spirits in my own hhouse and I wamma do it today

2007-09-30 01:51:30 · 19 answers · asked by Shelly D 3 in Paranormal Phenomena