Science & Mathematics - 27 October 2006

Here's the problem:

Regard y as the independent variable and x as the dependent variable, and use the implicit differentiation to find dx/dy in terms of x and y.

(x^2 + y^2)^2 = 4(x^2)y

2006-10-27 06:46:08 · 5 answers · asked by What gives? 5 in Mathematics

I was watching City in a Pyramid on Extreme Engineering on the Discovery Channel. She was experimenting with the use of hydrogen obtained from pond scum. She has a lab - I think it is called Energy Systems Lab. I would like to obtain info on her findings and on the lab - contact numbers, etc.

2006-10-27 06:43:08 · 5 answers · asked by Carla C 1 in Engineering

2006-10-27 06:42:30 · 21 answers · asked by nakerhaker 1 in Physics

If a bullet is shot in the air at a ceremony what distance does it travel,before coming down?

2006-10-27 06:36:57 · 7 answers · asked by Anonymous in Physics

2006-10-27 06:36:37 · 7 answers · asked by C. 2 in Astronomy & Space

2006-10-27 06:36:21 · 3 answers · asked by ie_turki 1 in Engineering

I received my daughter's date of immunisation for the "new" pneumonia, blood poisoning, ear infection etc. - It has apparently only been used successfully for 5 years in the USA. What do you think? I'm sceptical - I didn't know you could immunise against ear infections ... ? Those that have immunised their children and those that won't ... I'd be interested to hear your views.

2006-10-27 06:35:53 · 6 answers · asked by Anonymous in Medicine

An article on Yahoo's home page concerning the existence of ghosts. Some physicist says that Ghosts cannot exist because they break the laws of physics.(They violate Newton's law of action and reaction.) But, I always thought that ghosts were in another dimension. If ghosts are in another dimension how do we know that their(ghosts) laws of physics are the same as ours?? If ghosts are in a different Universe than ours, then our laws of physics might not apply to them. Make sense?? Plus ghosts are energy right?? Some people say electrical in nature. Maybe the fact that they have electrical qualities might explain how they can react in our universe. That is just speculation though. Help me out with this one.

2006-10-27 06:35:00 · 12 answers · asked by MightyRighty 3 in Physics

Have you been using Wikipedia for a long time? If yes, did you find the information there 100% accurate? Where can I go to find more accurate information on semiconductors?

Thanks

2006-10-27 06:32:43 · 14 answers · asked by gymnopedia 1 in Physics

Solve this problem in your notebook using all four steps.

Separate 846 into 3 parts so that the second part is twice the first part and the third part is triple the second part.

2006-10-27 06:30:34 · 15 answers · asked by Anonymous in Mathematics

2006-10-27 06:30:15 · 7 answers · asked by Anonymous in Astronomy & Space

Solve this problem in your notebook using all four steps.

The sum of three numbers is 26. The second number is twice the first and the third number is 6 more than the second. Find the numbers.

2006-10-27 06:29:50 · 9 answers · asked by Anonymous in Mathematics

2006-10-27 06:28:00 · 1 answers · asked by sam a 1 in Chemistry

do give me your comment on why you think it wouldn't works.

http://www.boinc.ch/~sleepsleep/viewtopic.php?t=130

2006-10-27 06:27:48 · 11 answers · asked by sleepsleep 1 in Engineering

The density of aluminum is 2.699 g/cm3. If there are two samples of aluminum: one 0.69g and one 0.96g, how do I find the find volume of each sample?

2006-10-27 06:27:03 · 6 answers · asked by Lisa 1 in Chemistry

2006-10-27 06:26:28 · 3 answers · asked by Lexi U 1 in Chemistry

2006-10-27 06:22:59 · 6 answers · asked by Anonymous in Mathematics

The length of each of the bonds between the atoms of a molecule of nitrogen (N2) is
0.0976 nm. The mass of a nitrogen atom is 2.32 x 10^11 pg.

Determine the moment of inertia of the molecule about an axis passing through the center of mass perpendicular to the line joining the two atoms. Ans. in units of pg nm^2.

2006-10-27 06:22:33 · 2 answers · asked by Anonymous in Physics

Find a particular solution yp of the given equation.

2006-10-27 06:19:51 · 3 answers · asked by spyderkiley 1 in Mathematics

2006-10-27 06:19:11 · 0 answers · asked by Lexi U 1 in Chemistry

2006-10-27 06:16:36 · 26 answers · asked by Denis B 1 in Physics

2006-10-27 06:15:49 · 13 answers · asked by Denis B 1 in Physics

The coordinates of two points are given. State the equation of the straight line joining these two points and whether the line is horizontal or vertical.

a. {(1,2,),(3,2)}

b. {(2,1),(2,3)}

c. {(0,5),(0, -5)}

d. {(5,0),(-5,0)}

e. {(10,5),(5,5)}

2006-10-27 06:14:14 · 7 answers · asked by artistmartista 1 in Mathematics

EG. 117 is what % of 279.44?

2006-10-27 06:13:28 · 5 answers · asked by Sherry 1 in Mathematics

This gas is found in small quantities in the lower layers of the stratosphere.


Though it is found in small quantities, this gas is extremely important. It absorbs ultraviolet radiation. Which gas is it?

Nitrogen

Argon

Ozone

Carbon Dioxide

2006-10-27 06:13:04 · 3 answers · asked by martha l 1 in Weather

between the rotational kinetic energy about the center of a sphere and the sphere's total kinetic energy in this situation:

The sphere is solid and rolls along a horizontal, smooth surface at a constant linear speed without slipping.

Is it 5/3?

2006-10-27 06:10:48 · 1 answers · asked by Dee 4 in Physics

2006-10-27 06:10:24 · 8 answers · asked by norman_193 1 in Geography

there are 6 couples,(1) how many ways can the couples sit in the row.
(2)how many ways can the people sit alternately by gender?

Is it possible if (1)-> C(12,2) *C(10,2)*C(8,2) .....*C(2,2)
and (2) -> C(6,1)*C(6,1)*C(5,1)*C(5,1)*...*C(1,1)C(1,1)

2006-10-27 06:09:33 · 3 answers · asked by Ann T 1 in Mathematics

2006-10-27 06:09:23 · 2 answers · asked by Greg 1 in Engineering

What is the min. time in which a person starting at rest can move 3 m on a tile surface if he is wearing shoes w/ friction (k) = .5

(3 sig digs) be very detailed

2006-10-27 06:06:28 · 2 answers · asked by the man 2 in Physics