Recent content by piyushkumar

in ubuntu, i got this through repositories: http://edu.kde.org/step/ just give it a try

start by the fact that one mole of any gas at 273K and 1 bar pressure occupies 22.7L volume

one can do it with calculus. write the force equation as m1\frac{dv1}{dt}=\frac{G m1 m2}{r*r}, where r is distance b/w them. Similarly for m2

when u open the bracket directly (as done in point 2), you get three terms, one of x_cap.x_cap, one of r_cap.r_cap, which you have written write, but term of x_cap.r_cap you have missed. since r_cap is (x x_cap + y y_cap + z z_cap)/\sqrt{}(x*x+y*y+z*z), so r_cap.x_cap is not zero, as your...

speed of sound in a gaseous medium = sqrt(gamma*R*T/M), where gamma is ratio of Cp to Cv of the gas ( refer http://en.wikipedia.org/wiki/Speed_of_sound#Speed_in_ideal_gases_and_in_air for more details) gamma, R and M are all properties of medium, so speed of sound cannot depend on freq, but...

why not give a try to some lisp like languages. Scheme/Racket was really fun to learn. I've heard Haskell is also good one.

a good resource for interesting mechanics problems is http://feynmanlectures.info/, and it is also free :D also give http://www.bansaltestprep.com/ a try

I doubt your statement that Newton's second law holds good only for constant mass system. I have successfully used it in past for variable mass systems like sand falling on/from a moving vehicle, and he rocket propulsion problems. I think that is what troubled you.