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nice info passion89, does that mean reverse osmosis is NOT part of microscopic membrane filters such as capillary tube etcc

It's getting a bit better. Banked track with friction is still stubborn. ANyone know how to do those train questions wit the wheels etc.

ok i read all the texts books and asked my teacher and i kind of understand all the theory now. it's just doing the questions, i get stuck on every second questoin:(

ok thanks

well if it's to keep it simple, then i'm all for it:D

can an object be moving if its upward force balances its downward force? i used to think by common sense this was an automatic no. but i read somewhere that if the forces cancel then acceleration will be zero on the particle but that does not necessarily mean a particle will be stopped, it could...

But can't the scenario be say 400newtons to the left and 100newtons to the rigth so therefore net force is 300 newtons to teh left so it is accelerating toward teh left and thus slowing down? so basically in 4u there won't be any of this type of question? why would they ignore applied force...

11. A car is coasting to the right and slowing down. The free-body diagram for this situation is shown below: I just have a question. If a car is moving rightward, shouldn't there also be a rightward force in the diagram to balance the frictional force?

I think the problem for me is that i don't do physics and i don't really understand the tension, forces, friction etc involved. e.g. like why does tension act toward a particle, shouldn't it be away (by common sense) and they usually don't teach newton's laws etc tehy just assume you know it...

yea i just found that out today thanks anyway haque.

hey guys for the following dp: identify and describe the main features of epidemiology using lung cancer as an example i wrote "Epidemiology is the study of the prevalence of dieases in society. There are several features of epidemiology which are significant. The first of...

ok i will try the question again tks

Nope that's perfect haque and pluvia. i get it now. it was just the word 'different' which confused me into thinking that one colour could only be used once. thks

@ haque can you explain please. thanks. @ followme i did the projectile motion and got the same answer as you, but in the book the answer is 7m/s, surely they didn't round up did they?

How much detail is needed for knowledge of enzymes? is all the bio knowledge incorporated or just some of it?

You guys haven't answered this question!

A reducing sugar is one which contains an aldehyde (carbonyl) or a ketone functional group. is this adequate?

Anyone:o

Ok i'll see if i can get those. so chambridge is counted as a harder book?

i'm finding it really difficult doin it from cambridge. does it get any harder? also any tips?