Recent content by kimi8

Homework Statement How do I calculate speed in a velocity-time graph? And in a displacement-time graph?Homework Equations --- The Attempt at a Solution I'm quite at a lost at how to calculate these =S Any help is appreciated.

Thank you so much for explaining that to me. It's nice and clear. Really appreciate it =)

Hey everyone, I was wondering if someone could help explain to me how you get these chemical equations? Propane: C3H8 + 5O2 --> 3CO2 + 4H2O + energy (heat) Corrosion (rust): 4Fe + 3O2 --> 2FeO3 How does 4 molecules of iron and 3 molecules of oxygen form 2 molecules of iron...