Science & Mathematics - 28 October 2006

1.)Solve: ( x + 4 )( x - 3 ) = 8

2.)Solve: y^2 + 4y - 5 = 0

3.)Solve:( y + 5 )( y - 7 ) = -20

2006-10-28 17:33:23 · 11 answers · asked by Dianna 4 in Mathematics

2006-10-28 17:27:55 · 6 answers · asked by harry 1 in Other - Science

Does this controller http://www.ar.com.au/~softmark/page44.html have inputs for a rotary encoder? I want to use this USB stepper motor controller with rotary encoders like this..

http://www.ar.com.au/~softmark/page44.html

Would this work? or would I need a different controller? Or something to work in conjunction with this controller?

Also.. what kind of power supply would I need with the USB stepper motor controller?

Any help would be great!

2006-10-28 17:27:11 · 1 answers · asked by Anonymous in Engineering

2006-10-28 17:25:38 · 20 answers · asked by Anonymous in Zoology

2006-10-28 17:24:52 · 9 answers · asked by Anonymous in Mathematics

-Q (warm water)= [Q (cold water)+Q(calorimeter)]

2006-10-28 17:23:18 · 2 answers · asked by blue_bee 4 in Chemistry

PLEEEEEEEEASE

2006-10-28 17:22:41 · 3 answers · asked by nim 1 in Mathematics

thanks so much, im curious why wavelengths are waves and not straight lines

2006-10-28 17:21:17 · 6 answers · asked by Linda 3 in Physics

2006-10-28 17:16:11 · 2 answers · asked by aryscary001 1 in Earth Sciences & Geology

Atoms are alot like our solar systems and galaxies.
Some people say no because of speed and whatnot, but if you were on a electron it probably wouldn't seem like you were going that fast.

But we are going fast around the sun, around the galaxy and where ever the galaxy is headed too.

The matter in the universe does have an interesting pattern too it.
http://cfa-www.harvard.edu/press/structure-lowres.jpg
Is there anything in cells or tissues than looks like this?

Is there any theories based on this?

Quantum Physics believes there could be a membrane around the universe, cell membrane?

2006-10-28 17:15:44 · 17 answers · asked by Sean 7 in Astronomy & Space

that is to transmit without using Wires

2006-10-28 17:15:09 · 8 answers · asked by Mr George 2 in Physics

2006-10-28 17:14:42 · 6 answers · asked by Anonymous in Other - Science

I know nothing about Science. All I know is what an atom is made of. I want to mix chemicals together to make a non-toxic compound that is somehow useful. I know I'm not being too clear but I think you can grasp my idea. I just want to work with science.

2006-10-28 17:08:34 · 3 answers · asked by Anonymous in Chemistry

2006-10-28 17:03:50 · 5 answers · asked by polomilotigress 1 in Mathematics

2006-10-28 17:02:55 · 13 answers · asked by cheese77590 1 in Astronomy & Space

2006-10-28 17:02:42 · 4 answers · asked by jercotry 1 in Astronomy & Space

while your traveling you never stop or slow down.

2006-10-28 17:02:08 · 17 answers · asked by nas 1 in Astronomy & Space

2006-10-28 16:55:04 · 4 answers · asked by Anonymous in Biology

2006-10-28 16:54:40 · 19 answers · asked by garden_mom 2 in Weather

KMnO4 + NaOh > KOh + NaO4

is it right and what is O4

2006-10-28 16:54:17 · 4 answers · asked by Me + Me = BANG! 2 in Chemistry

If so what do you think of his predictions, especially the one regarding a Second Great Depression that's supposed to happen within a few years? Do you think this will happen?

2006-10-28 16:54:02 · 7 answers · asked by cricket121269 1 in Astronomy & Space

2006-10-28 16:53:34 · 3 answers · asked by Jeramie L 2 in Weather

I need information specifically with regards to when the Newton-Raphson method (in calculus) will converge (mathematical explanations will be helpful) and when it will not and why. Thanks.

2006-10-28 16:53:06 · 4 answers · asked by Anonymous in Mathematics

2006-10-28 16:51:16 · 4 answers · asked by Tina M 1 in Medicine

is there a good answer????????????

2006-10-28 16:51:08 · 8 answers · asked by churchie 1 in Astronomy & Space

Of an equation too, not an expression well u know...

2006-10-28 16:47:55 · 7 answers · asked by Anonymous in Mathematics

A diaphragm pump used for pumping Ammonia liquid from 25 ata to 225 ata employs a hydraulic coupling for capacity control. The coupling is connected to the pump through a flywheel and gear box. we want to replace the hydraulic coupling by direct coupling and introducing a variable frequency drive facility for the motor. Can we do it without affecting the performance of the motor and the pump? Please clarify.

2006-10-28 16:47:25 · 2 answers · asked by Balakrishnan M 1 in Engineering

2006-10-28 16:40:14 · 12 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-28 16:35:33 · 10 answers · asked by Anonymous in Zoology

2006-10-28 16:31:07 · 22 answers · asked by glasgownaughtyboy 1 in Physics