Science & Mathematics - 24 October 2006

i need analyctical soloution for this integral

2006-10-24 08:07:47 · 2 answers · asked by hadi m 1 in Mathematics

when fat soluble substances move through the bilipid layer of the plasma membrane, is it through simple diffusion?

2006-10-24 08:04:44 · 1 answers · asked by shih rips 6 in Biology

Is it somekind of tree??

2006-10-24 08:04:19 · 30 answers · asked by SCOTT B 4 in Botany

A sample of blood is placed in a centrifuge of radius 12.0 cm. The mass of a red blood cell is 3.0X10^-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 X10^-11 N. At how many revolutions per second should the centrifuge be operated?

2006-10-24 08:01:35 · 1 answers · asked by activegirl 1 in Physics

2006-10-24 08:01:24 · 1 answers · asked by ohman33 1 in Chemistry

Consider the cubic function f(x)=ax^3+bx^2+cx+d where a doesnt not equal zero. Show that f can have zero, one, or two critical numbers and give an example of each case.
well im pretty sure you have to take the derivative first, so it would be 3ax^2+ 2bx+c
and then...do i do the quadratic formula to find zeros? idk! help!!

2006-10-24 08:00:16 · 7 answers · asked by Anonymous in Mathematics

and can you tell the chemical properties of the just by looking at it?

2006-10-24 07:54:49 · 2 answers · asked by bigdice 2 in Physics

I love all of the sciences and I am fascinated by forensics and crime-solving via scientific methods. I think I would love to work in a lab, analyzing physical evidence from crimes- and for lack of a better description- to perform the kind of work like the character "Greg" performs on the original CSI.

What is the actual title for a job like that? What kind of education does one need (particular major/classes, etc.)? Who would be the employers for such a job and what credentials and experience would impress them?

Do you work in this field? What are the high and low points? Best temperment suitable for the job? Hours? Anything else of interest about the reality of working such a job?

I'm looking for detailed answers that might help me get into the field .

I wasn't sure how to categorize this question. If you have a suggestion for a better category, please let me know.

Thanks!

2006-10-24 07:54:48 · 5 answers · asked by clover 1 in Chemistry

2006-10-24 07:53:57 · 3 answers · asked by Dennis B 1 in Mathematics

An air puck of mass 0.32 kg is tied to a string and allowed to revolve in a circle of radius 1.3 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of 0.9 kg is tied to it. The suspended mass remains in equilibrium while the puck on the tabletop revolves.
(a) What is the tension in the string?
(b.)What is the force causing the centripetal acceleration on the puck?
(c)What is the speed of the puck?

2006-10-24 07:51:10 · 2 answers · asked by activegirl 1 in Physics

What is the pH of a buffer that consists of 0.58 M HCOOH and 0.71 M HCOONa? pKa of formic acid = 3.74.

2006-10-24 07:50:57 · 2 answers · asked by Anonymous in Chemistry

tryin to design a primer,which shud make point mutation, but the melting temperature is coming at 65 degrees, but it has to be more than 78 degrees....how is that posible without further increasing the G C content?....

2006-10-24 07:49:11 · 3 answers · asked by kosfactor 1 in Biology

According to math professors, the limit of the sequence (.9; .99; .999; ...) is 1 and thus the infinite sum 9/10+9/100+9/1000+... is defined by this limit. In fact, they claim that every real number has a limit. However, no mathematician can tell you what is the limit of pi, e, sqrt(2) or any other irrational number. One difference between pi and 0.999... is that we know the limit of the sequence (0.9; 0.99; 0.999; ...) but we do not know the limit of the sequence (3.1; 3.14; 3.141; ...). So what's the real difference?

2006-10-24 07:48:54 · 11 answers · asked by Marianne M 1 in Mathematics

2006-10-24 07:46:29 · 3 answers · asked by Dennis B 1 in Mathematics

2006-10-24 07:45:40 · 6 answers · asked by cris 1 in Biology

2006-10-24 07:43:50 · 3 answers · asked by Anonymous in Other - Science

TOPSwitch is an inteligent mosfet. if i want to use two top switches in parallel, then how should i use them?

2006-10-24 07:43:12 · 1 answers · asked by prachi b 1 in Engineering

2006-10-24 07:40:46 · 9 answers · asked by xrocksuperstar 1 in Mathematics

there is infinte space between them. How can that be possible: having infinity within a finite structure?)

Ex. 1.1, 1.01, 1.001, 1.0001, 1.00001, 1.000001, 1.0000001, 1.00000001, ad infinitum.

Any thoughts?

(Just something I was mulling around in my head one sleepless night.)

2006-10-24 07:40:10 · 8 answers · asked by JaMoke 4 in Other - Science

can have sunlight,has something to do with photochemistry

2006-10-24 07:39:58 · 19 answers · asked by jaya p 1 in Chemistry

2006-10-24 07:39:37 · 11 answers · asked by Gemz 1 in Biology

who was this scientist who worked on variation and found out what it was. What was the name of the scientist.
What did he do to find out about variation what he found out first.

2006-10-24 07:34:56 · 3 answers · asked by aliyah 1 in Biology

Or how big something can be.

2006-10-24 07:33:47 · 19 answers · asked by spike 5 in Other - Science

2006-10-24 07:33:38 · 8 answers · asked by joelpsp 2 in Geography

l. 10x-4y=13
2. 4x + 7y = 14
3. 2x-3y+6 =0
4. -2x + 3y + z = 15
5. 9x + 4z = 7 + 8y

2006-10-24 07:32:33 · 7 answers · asked by Anonymous in Mathematics

During Beta decay, an electron is shot out of the nucleus and a neutron changes into a proton. A proton is a up,up, down quark combination and a neutron is an up, down, down quark combination. Is the electron coming from the neutron and if so then must an electon be smaller that a quark since both Up and Down quarks have about the same rest mass? Are electrons a type of "string" from string theory?

2006-10-24 07:30:56 · 6 answers · asked by The Cheminator 5 in Chemistry

if a penny is dropped from a building and lands on the ground at 6 seconds. What is the height of the building?

2006-10-24 07:30:06 · 4 answers · asked by dreamz 4 in Physics

2006-10-24 07:28:25 · 4 answers · asked by Akanksha I 1 in Chemistry

2006-10-24 07:27:35 · 4 answers · asked by Banna_skillz 2 in Geography

-lik gravity nd friction stuff lik dat....

2006-10-24 07:27:14 · 4 answers · asked by Anonymous in Physics