Recent content by Bandarigoda

Oh thank you very much guys. I got it now.

Here

Assume Earth's radius R and there is a mass m. We put that mass in height of R from the Earth's surface. I want to calculate it's potential energy. I calculated it and got mgR/4 but my teacher said the answer is mgR/2 . Why my answer is wrong? I just calculated the gravity in the height of R...

@chemnoob balancing is not a problem for me as long as I know the oxidation number.

I see. So it's up to my experience. I'll have to find more equations and solve them. Thanks for help guys. Yes the overall charge is equal to -2 Cr is +6 So, 12 + (-14)=-2

Hi everyone, In my school I was given a problem. It's that Cr2O7-2 + H2S in a acidic medium. And my teacher told that Chromium becomes Cr+3 . I want to know is there such a way to calculate the oxidation number in acidic medium. Or is it required the experience?

Oh okay. :)

Did u ask it from me? I can't understand, sorry my bad english. Am i wrong about the derivation?

You need to derive it. By t subject, do it twice. One derive tell you velocity, second tell you acceleration.

Well i think you can use, E = mc¤

Search for Levitron Revolution device

Its a thing that we won't be able to solve ever i think? But maybe bosons can

Oh, i thought you are a bad guy. Sorry, i misunderstood due to my bad english. If someone wants, look for buddhism

Acceleration has stopped at 5.1ms-1

Dafuq, women exist to have babies and to serve men? Are you even have a mother? Every human being must get same rights, women can do anything like men do.