Science & Mathematics - 28 July 2006

2006-07-28 05:28:30 · 3 answers · asked by farzy_sh 2 in Biology

I learned in Calculus that if y=f(x), then

d/dx g(y) = g'(f(x))f'(x)

but what if y is a vector? (x and g(x) are both scalars.) If g(y) is a function of an array y, and each element of y is a (possibly different) function of x, then how do I express the derivative of g(f(x)) with respect to x? Is there a generalized version of the chain rule for vectors?

I'm trying to understand neural nets and this keeps coming up.

2006-07-28 05:24:15 · 4 answers · asked by ChicagoDude 3 in Mathematics

ficoll hypaque used for density centrifugation to separate lymphocytes.n also density of red blood cells?

2006-07-28 05:23:04 · 1 answers · asked by Anonymous in Biology

2006-07-28 05:21:00 · 5 answers · asked by Jim 2 in Chemistry

If not, how do humans aquire these bacteria?

2006-07-28 05:18:30 · 8 answers · asked by nicemachine 2 in Medicine

2006-07-28 05:17:38 · 2 answers · asked by SUBRATA M 1 in Engineering

2006-07-28 05:17:31 · 13 answers · asked by graffeng 1 in Zoology

2006-07-28 05:16:26 · 3 answers · asked by teamsenior1 2 in Biology

2006-07-28 05:16:09 · 3 answers · asked by sim 2 in Physics

A soild iron cylinder has a radius of 0.250-m and a mass of 145-kg. Calculate the kinetic energy of this cylinder when it is rotating about its axis at a rate of 13.5 rev/s?

a. 163 x 10^4 J
b. .0163 x 10^4 J
c. 1.63 x 10^4 J
d. 16.3 x 10^4 J

2006-07-28 05:16:00 · 5 answers · asked by Lou 1 in Physics

Does it kills everything on its path? do they really hit the water?

2006-07-28 05:15:31 · 4 answers · asked by Thor 2 in Weather

2006-07-28 05:13:52 · 8 answers · asked by nicemachine 2 in Medicine

2006-07-28 05:13:52 · 19 answers · asked by Kenneth Koh 5 in Other - Science

2006-07-28 05:13:27 · 6 answers · asked by greg 1 in Weather

time to throw one back at the evolutionists, i've been all over the religionists lately

but this one's been bugging me a bit. here:

http://www.religioustolerance.org/ev_noway.htm#10

- there is a rebuttal against the complaint that transitional species are missing from the fossil record.

- however, we have an even more compelling domain in which to investigate the phenomenon of transitional species, and that is organisms currently living, now.

- can anyone give me an example of a half ape, half human transitional species alive now?

- please list off current transitional species

2006-07-28 05:12:02 · 12 answers · asked by Smegma Stigma 4 in Biology

2006-07-28 05:11:44 · 5 answers · asked by SUBRATA M 1 in Engineering

Who comes up with bad science like "global warming" (besides the libs) ? ....... Scientists that love to spend grant money???

2006-07-28 05:11:34 · 8 answers · asked by aBranch@60-WA ,<>< 4 in Other - Science

2006-07-28 05:10:34 · 13 answers · asked by Anonymous in Earth Sciences & Geology

It is black on its underbody and yellow on its wings, its approx. 3 inches long, and has pinchers at least 1/2 an inch long on its mouth.

2006-07-28 05:08:47 · 2 answers · asked by Anonymous in Other - Science

2006-07-28 05:08:14 · 2 answers · asked by PVL N 1 in Zoology

2006-07-28 05:06:02 · 15 answers · asked by michele t 1 in Biology

2006-07-28 05:04:03 · 1 answers · asked by khanujarajeev 1 in Engineering

2006-07-28 04:59:51 · 4 answers · asked by Faisaltheonly1 2 in Chemistry

2006-07-28 04:58:53 · 6 answers · asked by kd0mu 1 in Zoology

I've got the solid one for my area and the seabed and quaternary, but what will the drift one have on it and am I likely to have it on those other maps? Thanks

2006-07-28 04:57:11 · 7 answers · asked by schming2005 1 in Earth Sciences & Geology

Humans have not changed much over the last several thousand years. Although our longevity has been extended that has more to do with healthcare than evolution. What do you think will happen to humans in the next several thousand years?

2006-07-28 04:56:51 · 14 answers · asked by Lunar Jon 1 in Biology

2006-07-28 04:55:42 · 3 answers · asked by Anonymous in Chemistry

Or at least the most ever to align and which ones were they. Doesn't have to be in anyone's lifetime.

2006-07-28 04:53:29 · 7 answers · asked by kris_c_tina 2 in Astronomy & Space

2006-07-28 04:52:21 · 3 answers · asked by Anonymous in Chemistry

do other species give hand jobs for fun (or any other reason)?

2006-07-28 04:49:58 · 5 answers · asked by Anonymous in Zoology