Recent content by AlexS

Hello.I have a question about entropy of a thermodynamic system. 1)If we have let say a gas that is separated by some thermo isolated walls (so no heat goes in or out) does the entropy of that gas conserve? I taught that if S=dQ/dt, because Q=0,then the entropy should be conserved. 2)So,does the...

Another document about the mathematical operations in physics- http://www.physics.ohio-state.edu/~aubrecht/OSAPSdivision.pdf

Now, I come back with another answer because I understand that you need to find the solutions of this equation. It is actually impossible because you can't. It is an equation with 2 variables, and to understand why you can't , for instance, when we have a system with 2 variables, we need 2...

You know that you can get any factorization you want with any formula? Yes, you can use general formula such as (a+b)^2=a^2+b^2+2ab, but you can also find any factorization you want for any formula, using Horner's method for factorization (https://en.wikipedia.org/wiki/Horner%27s_method). Now...

Interesting conversation, I think that the criterion with unit is very important.I actually think that after you have this fundamental defining formulas such as average speed=total distance/total time, you can obtain other formulas such as Galileo's formula(v square=v0 square+2ad) just doing the...