Science & Mathematics - 8 September 2007

In Algebra, there are formulas. For ex: a^2 -b^2 = (a+b) (a-b) which can be styled as "software" in Computer. If you apply the formula to 103x97 = (100+3)(100-3)= 100^2 - 3^2 = 10000-9 = 9991, you get a faster answer. This is called "application software"
What are your views on this.

2007-09-08 20:16:44 · 6 answers · asked by LAKSH P 1 in Engineering

5/4x60

2007-09-08 20:16:34 · 13 answers · asked by Anonymous in Mathematics

Prove that [ (1 - sin x) / (1 + sin x) ]^1/2 = sec x - tan x when x is acute.
(Please start from LHS and without altering the equation on RHS)

Why is the restriction on x necessary?

Thanks in advance!

2007-09-08 20:12:48 · 2 answers · asked by N.y.Rych 1 in Mathematics

Please show how you got the answer.

2007-09-08 20:05:00 · 10 answers · asked by Anonymous in Mathematics

right from their homes,how do they just appear there?

2007-09-08 19:47:49 · 19 answers · asked by Life goes on... 6 in Paranormal Phenomena

2007-09-08 19:22:03 · 8 answers · asked by Anonymous in Astronomy & Space

2007-09-08 19:07:59 · 2 answers · asked by lolitta 4 in Chemistry

2007-09-08 19:03:23 · 8 answers · asked by animesh d 1 in Botany

Thanks.

2007-09-08 19:03:21 · 1 answers · asked by Boi 1 in Chemistry

In a discussion with my fiance we were discussing the stars and how everything is constantly moving he says that one day the milky way will collide and the two will become one. Is this even remotely possible?

2007-09-08 18:58:10 · 13 answers · asked by fierce.tigress 2 in Astronomy & Space

Like if the compound/substance is composed of at least one metal element, then that substance conducts electricty?

2007-09-08 18:48:55 · 5 answers · asked by Boi 1 in Chemistry

Just thinking of the times, as a young adult spending time at my Grandparents Ranch - in Crescent City - The wonderful, innocent age where flowers, sheep and cattle were, the Easter Lilies, Ship Ashore, catching snakes, fishing off the pier, when life was so much more uncomplicated..........

2007-09-08 18:48:18 · 4 answers · asked by Henry H 6 in Weather

What's the pH value of 0.01M of glycine? pKa of glycine is 2.34...

What is the pH if it's 0.1M of glycine?

2007-09-08 18:45:50 · 1 answers · asked by Anonymous in Chemistry

the medicine is amitiza and the doc didnt bother to check for signs of an obstruction and it says do not take it if you have an obstruction so i was wondering if anyone has any idea what could happen if i was to have an obstruction and take this

2007-09-08 18:42:04 · 5 answers · asked by sohot212000 1 in Medicine

2007-09-08 18:36:20 · 3 answers · asked by Anonymous in Earth Sciences & Geology

(in reflex action)
sensory neuron are those which carry information from the receptors to the spinal cord
motor neurons are those which carry information from the spinal cord to the effectors
what is relay neuron??

please explain in simple language and thanks for your time

2007-09-08 18:30:34 · 6 answers · asked by Anonymous in Biology

when I was younger, I used to think that Nuclear Power Plants used nuclear material to collect electrons, but now I know that it's only the heat given off that creates steam which turns a turbine.
HOW LAME!

Why can't we use nuclear material to create electricity directly?
Or maybe even replace electrons altogehter.. replace the electrons with some other charged particle that repells objects similar to magnatism, maybe then we will no longer need copper wire???? If we could find an alternative to electrons and have repulsion properties, we could re-invent the electric motor, make it so that it works directly from nuclear material??

2007-09-08 18:25:49 · 4 answers · asked by BIGDAWG 4 in Physics

Sure it would be nice to know for curtain if there is other life out there, intelligent or other wise. But this mathamatical equation shouldn't used as proof that life exists out there, sure i like to keep a open mind but it's hard not to be a " seeing is believeing " kind of person.

2007-09-08 18:20:25 · 9 answers · asked by Anonymous in Astronomy & Space

as per above if u can the difference between the oxide and sulfide extraction

2007-09-08 18:19:38 · 1 answers · asked by The MD 2 in Chemistry

Like, Bigfoot,Mothman,Loch ness...

2007-09-08 18:13:51 · 8 answers · asked by Life goes on... 6 in Paranormal Phenomena

a) 2x*2+5x+2
b)2x*2-10x+12
c)ac+ad+bc+bd

thank you for all your help

2007-09-08 18:12:39 · 4 answers · asked by MB 4 in Mathematics

5y-(2-3y)=54

3x-4+8x + 3=32

7x-6(11-2x)=10

6(x-2)=2(9-2x)

8x-3(6+x)=5x+4

2007-09-08 18:12:14 · 7 answers · asked by Anonymous in Mathematics

They get burned and they continuo to fly to the light bulb until they die.

2007-09-08 18:07:46 · 5 answers · asked by Anonymous in Biology

2007-09-08 18:03:06 · 11 answers · asked by ? 2 in Earth Sciences & Geology

2007-09-08 17:57:43 · 15 answers · asked by v.anjana 2 in Chemistry

details please

2007-09-08 17:56:00 · 5 answers · asked by justask23 5 in Astronomy & Space

A) How far below an initial straight - line path will a projectile fall in one second?
B) Does your answer depend on the angle of launch or on the initial speed of the projectile? Defend your answer.


When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:50:20 · 3 answers · asked by Anonymous in Mathematics

At the instant a ball is thrown horizontally over a level range, a ball held at the side of the first is released and drops to the ground. If air resistance can be neglected, which ball- the one -thrown or the one dropped from rest- strikes the ground first?

When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:49:12 · 1 answers · asked by Anonymous in Physics

A position of a runner is given by x=4.10t-0.500t^2, where x is in meters and t is in seconds. What is the average speed between t=0 and t= .820 s?

2007-09-08 17:48:28 · 1 answers · asked by Anonymous in Physics

How does the downward component of the motion of a projectile compare to the motion of free fall?

When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:48:19 · 3 answers · asked by Anonymous in Physics