Recent content by aham925925

The given question was not worded well But i understand now that in a compound such as K2SO4, you would treat SO4^2- as one ion in this compound...therefore you would multiply 1 by the number of mol there is of K2SO4.. Problem solved...thanks guys

Yeah i may have...haha The problem is...I'm making sure because the answer at the back of my book I know is wrong...So i have nothing to check against

[SOLVED] Amount in mol of compound ions This is just a quick question as it has slipped my mind.. Does anyone know how you would find the mol of a compound ion (ie - SO42- (sulfate ion)), if you are given the mol of the whole compound (in my case it is K2SO4) I know to find single ions...

yes, of course it would be 135 degrees as we are dealing with a change in velocity...since it is moving from a north direction to a south westerly one...the angle would have to be large like 135 degrees.. OK i have solved this problem now...Thanks everyone for your help...

I just worked out my value for part b to be 28.28 ms-1 (answer at the back is 28ms-1..yay!) I just need to find the angle now...i got 45 degrees but the book says 135 degrees (180-45) this is the last part i need.

cartesian vectors? nope, don't think I've heard of those before.

Yes sorry I was looking at the wrong question So if it is traveling at 20ms-1, what would it be traveling at a quarter revolution (then you cold work out change in velocity) So the change in velocity at half a revolution would be final velocity(-20) minus the initial velocity(20) equals...

Well...it's not -20ms-1 because the answer at the back of the book says that it's 28ms-1 (at 135 degrees anticlockwise to original motion direction) In order to get the answer, would you have to go about resolving vectors or anything?

ohh yes of course... ha ha thank you for that how would you find the change in velocity now that we finally have that figured out??

It would always be moving forward... I'm sorry...like i said...I haven't done circular motion yet and we have just started holidays here in Australia so i can't ask my teacher...

Sorry but would it be moving in the same direction?

hmm i see what you're getting at but i still don't know the direction that the airplane will be moving... I thought all circles were the same...

ahh yes...see I'm not really sure what that means...which is probably part of the reason why I don't know where to start...

Well, the plane would be flying downwards..

Homework Statement A model airplane is controlled to fly in a horizontal circle of radius 24 metres with a constant speed of 20ms-1. An observer beneath the plane notices that the plane is flying anticlockwise. Find the magnitude of the change in velocity of the plane after: a- a full...