Science & Mathematics - 13 January 2007

thank you

2007-01-13 01:11:43 · 10 answers · asked by haileybaby331 1 in Mathematics

at present how many laws of thermodynamics are there ?

2007-01-13 01:05:56 · 3 answers · asked by SAI R 1 in Physics

2007-01-13 01:05:15 · 3 answers · asked by subrahmanyam n 1 in Chemistry

consider x^2 - x^2 (x^2 means x squared)
x^2 - x^2 = x(x-x)
and, x^2 - x^2 = (x + x) (x - x)
so,x(x-x) = (x+x) (x-x).
(x-x)cancels.
so, x = x+x.
x = 2x.
1 = 2
but how is this possible???
if iam wrong, where and how??

2007-01-13 01:02:00 · 7 answers · asked by shreya i 2 in Mathematics

The age of the sun is 4.5 Billion years old, it had a core made up of Hydrogen and Helium gas. I'm curious to know why it's energy source/supply hasn't burned out yet.. Could anyone explain?

2007-01-13 00:57:05 · 15 answers · asked by Miss LaStrange 5 in Astronomy & Space

Could someone please list the differences betwean a cube and a square for me? Thanks.

2007-01-13 00:52:57 · 11 answers · asked by Remy 1 in Mathematics

2007-01-13 00:52:50 · 5 answers · asked by LEONIDAS 1 in Medicine

2007-01-13 00:52:24 · 4 answers · asked by Anonymous in Chemistry

Can anyone give me some scientific evidence/proof for either evolution or creationism? I have questions and can't seem to find anyone that can prove their answer either way.

2007-01-13 00:52:18 · 12 answers · asked by Fish Lover 5 in Biology

2007-01-13 00:49:47 · 1 answers · asked by Sled Queen 3 in Biology

2007-01-13 00:48:31 · 11 answers · asked by Anonymous in Mathematics

WE HAVE SOME COPPER MINERAL.IN WHICH RADIOACTVITY IS HIGHER.NOW IF I HEAT IT UP TO 1000 DEGREE CENTIGRADE THEN WHAT HAPPEN.

2007-01-13 00:46:43 · 3 answers · asked by rajendra l 1 in Chemistry

divide x^2-1into f(x)= 2x^3+3x^2+9x+5 write your answer in the form given by the division algorithm in other words write your answer as 2x^3+3x^2+9X+5 =q(x)(x^2-1)+r(x) for some polynomials q(x) and r(x).

2007-01-13 00:46:18 · 2 answers · asked by haileybaby331 1 in Mathematics

Is it possible to go back to the past? I heard traveling to the future is easier(theorically)to explain, it is just a matter of speed. But towards the past is a chaos to explain.

2007-01-13 00:45:44 · 20 answers · asked by noname 1 in Astronomy & Space

2007-01-13 00:45:25 · 9 answers · asked by Darnell L 1 in Geography

2007-01-13 00:44:45 · 6 answers · asked by phil m 1 in Zoology

if we can travel ,move faster than light can we go back in time or go to the future using the so called time machine?can we know the future by using it?if it is possible then what about theory of relativity?

2007-01-13 00:42:32 · 6 answers · asked by mahen 1 in Astronomy & Space

1. The weight of an object on the moon varies directly as its weight on the Earth. A person who weighs 150 pounds on Earth weighs 25 pounds on the moon. What is Jack's actual weight if he weighs 23 pounds on the moon?

2. If 27 chipmunks can consume 54kg of nuts in 45 days, how long will it take 72 chipmunks to consume 240kg of nuts?

2007-01-13 00:39:43 · 8 answers · asked by Anonymous in Mathematics

If you maintained constant water and sunlight levels, would heat or lack there of affect the size of tree rings?

If so in what way?

And before some funny guy says it, No I am not talking about setting a tree on fire....

2007-01-13 00:36:51 · 5 answers · asked by Stone K 6 in Botany

ok it's 30' across on bottom slope from left corner to peak is 18' and slope from right to peak is16.5'??

2007-01-13 00:36:44 · 3 answers · asked by plumbinmonkey 2 in Engineering

2007-01-13 00:31:07 · 6 answers · asked by Brian's Babe 2 in Zoology

2007-01-13 00:22:54 · 2 answers · asked by Sanjay R 1 in Biology

I'm in Charleston, SC, USA. We never really get that cold but the fluctuations have been amazing so far this month. I start out in the morning all bundled up, by noon I'm ripping off clothes, then putting them back on again. Global Warming or what?

2007-01-13 00:22:08 · 14 answers · asked by Anonymous in Weather

from michigan to florida

2007-01-13 00:21:53 · 6 answers · asked by gert c 1 in Geography

1.what are the roots of the following equations?
(i) 4/9p^2=2/3p (ii) 16m^2=4/25m
2.solve: 4z^2+4z+1=0
3. find x in terms of y
1/4x^2+xy+y^2=0
(show every step please)

2007-01-13 00:18:00 · 3 answers · asked by simple_life726 1 in Mathematics

2007-01-13 00:17:20 · 2 answers · asked by joanna m 1 in Zoology

now have a look i was shocked to see the list

2007-01-13 00:14:55 · 14 answers · asked by johnny boy rebel 3 in Zoology

2007-01-13 00:13:48 · 17 answers · asked by Anonymous in Other - Science

2007-01-13 00:10:25 · 11 answers · asked by SHARAD S 2 in Weather

My biology teacher told us that there IS a definite answer to this question, tracing down the evolution line, but he says he wouldn't tell us unless we're still studying biology in Grade 12. Does the chicken come first or the egg?

2007-01-13 00:08:19 · 16 answers · asked by formystudies3 1 in Biology