Recent content by xCross

If a small tube (capillary tube) is dipped into the water, the water level rises. Which means someone is doing work on the water to rise it against gravity. My question is, who is doing this work? My guess is the internal energy of the molecules is doing the work. That also means that...

Imagine an object is resting upon the floor. The object is pushing the floor with a force mg, which is vertically downward. The floor is also pushing the object back with the same magnitude of force but it is vertically upward. My question is: which one of these force is called weight? My...

Thanks for this precious suggestion.. :) These books are really short and cheap too. But I think I will be getting the Beecher's one. So, should I buy these books along with that too? What's your suggestion? Will I need them if I have the Beecher's one?

Hi, I need a good book for high school Algebra. If possible, Algebra and Trigonometry both in one book. By High School, I mean for age 15-17years. :P I have chosen Algebra and Trigonometry (3rd Edition) by Beecher/Penna/Bittinger. I think its a good book. Please suggest me more books...

this book is good.. thanks a lot for suggesting this book.. :)

Hi, I am looking for a good chemistry book for my studies. I am looking for something that is similar to this Physics book: Halliday/Resnick/Walker's Fundamentals of Physics. Any suggestion for me? Thanks in Advance.

What is a fourth dimension?? Is this time or any other space coordinate??

Wave is a simple harmonic motion which carries energy and information through an object but do not move object's particles..

New method would not break Einstein's Theory of Relativity -xCross Source: http://www.dailytech.com"

I am having some problem understanding this.. By Newtons Gravitation Law we know: F=Gm1m2/r^2 centre of the particle means r=0, am I right? if so, the equation says that the force will be infinite on the centre of the earth.. but we see that it has 0 force on the centre.. why such thing...

You must not imagine that the big bang was like the explosion of some gigantic firecracker and that, in principle at least, you could have stood to one side and watched. There was no "one side" because the big bang represents the beginning of the spacetime itself. So, from the point of view of...

you can't point any place and say, big bang happened here..

had done that.. it's from DailyTech!

think about you and your friend is in a train.. the train is moving.. are you moving?? or is your friend moving??

Star half way across the known universe exploded when existence was half its current age There is an old adage that goes, “If a tree falls in a forest and no one is around to hear it, does it make a sound?" A similar question was answered on Friday, “If a star blew up some 6 billion years...