Recent content by Arowana

Why do we crystallise the product?? hehehehhe... why do we crystallise the product??..and why do we ethanol and water to crystallise them?? im a physics student. but this chem question came across me and i just want to know to make things more clearer.. i know this is an extremely...

ummm..cant you use Cosine rule to solve this??

did you take errors into consideration? like the ball slides instead of roll??

THanks Pietjuh , and sorry for getting you in trouble.

Hi, i exam is coming up in a week and i have no clue so wat ever on how to solve this question. How do i calculate the minimum number of lines? What i need to answer to have full marks?? Q: The Sodium vapor spectrum contains two bright yellow lines which have almost the same...

thanks hootenanny umm...i still don't get the 2nd part, how do i use trig?

hi, i know that the entry ray of light into a medium will exits parrallel to the entry ray. The problem ask me to prove it. i have drawn a diagram and done the mathematical calculation. i just can't put it into words, could some one please help me out. and 2nd part to that question is...