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Fenris, Don't worry about it too much. When you are graphing things and want the gradient to be the quantity you are looking for then you make the axes what they have to be to make the gradient that thing. eg v=d/t Let's say you have a runner who you let run for a certain distance. Then the...

When you are finding resistance you want the gradient of your graph V/I = R. Thus I is on horizontal axis and is independent variable and V is the dependent variable on the vertical axis. However, you are actually changing the voltage out of the power source, so that is really the independent...

Hi Tabby, I am probably not quite what you are looking for, but I left the message for a bit to see if someone more suitable answered and since they didn't I thought I would. You can check out my profile if you want. I could email with you or we could chat in this thread here so you can...

Pendulum - what did you alter? The length of the string = independent variable because the change of the quantity is independent of everything else in the experiment because YOU did it. What did you measure? Time/period = dependent variable because the change in this is completely dependent on...

A nice set of conflicts there. If you know what this woman is going to say against Darwin you have a whole essay worth of conflict there. And the conflict of marrying for money and status and not love - gosh isn't this the plot line of many a classic (Austin?? Never read it, but I think it is...

For a short story to have good development it needs minimal characters and minimal ideas. That way you have more space to develop. That said, you can certainly include quite a lot by hinting at and allowing the reader to fill in the gaps. So, if you want to go big and dramatic, have the least...

n2 and n1 are the absolute refractive indices of substances 2 and 1 (respectively) calculated when light travels from a vacuum into that substance. These are usually given.

I think it might also have to do with the teacher. If a teacher can explain the topic in such a way that makes it a no-brainer then it is not such a hard topic. But if the teacher is struggling with the concepts (which may be the case if the teacher is not primarily a physics teacher) they may...

I think people might find it a difficult topic because it deals with new concepts and if you don't get the basics then the whole topic falls apart. Also, you are dealing with motors and generators which are essentially the same BUT completely different in how you use the hand rules. That can be...

Since you don't need to learn the equations off by heart I would recommend the following: - get that forumla sheet and know what each formula for space is about, what each variable in the equation means and how to use that equation AND what the SI units for each value are. - look at the...

Actually, the grip and right hand rules are exactly the same. It is just that the grip rule does not indicate force because it is used to show the direction a magnetic field circles a current carrying wire.

The right hand grip rule/right hand rule must be done using (obviously) the right hand. It is funny to watch students do physics exams with their pen in their right hand and doing the hand rule with their left hand. They will inevitably end up with the wrong answer. I always tell students - PUT...

Why not? Of course you can. Using the tools you have to hand to reach the right answer is never wrong. Just because they don't teach calculus or encourage it in physics (anymore) does not mean that using it is wrong. In fact, go to Uni and do Physics and it's all calculus and differentiation...

OK, I know where I went wrong. Go back and look at my original post after yours.

You might like to try the How Stuff Works website http://electronics.howstuffworks.com/speaker.htm http://electronics.howstuffworks.com/question309.htm There was no galvanometer. Or this for a model loudspeaker: http://www.practicalphysics.org/go/Experiment_336.html Galvanometer...

Any prac that involves the production of a current due to moving a magnet near a wire coil is a Lenz's Law Prac. Essentially, if you have induced a current in a wire then you have done a Lenz's Law Prac. Generators, motors, transformers. All of that. Lenz's Law = a current/EMF/magnetic...

No probs. The equation you are using is the following: I (proportional to) 1/d2 Actually, it is Brightness (Intensity) = luminosity/Area Luminosity is the Energy per second reaching that point. Brightness or Intensity is the Energy per second per square metre reaching a point distance d from...

I mean the Dummies books are really really good. Have a look and see if it what will help you. Unfortunately I don't have MSN, only YIM. But message me here on BOS and I'll message right back. And yes, like the others said, don't study so much. Only do an hour at most at a time (half an hour...

Convert measurements in cm to metres before doing anything else. Always convert anything in non SI units before using them. Don't forget there are 85 turns and hence A = nLW Flux at start = nBA cos(angle between B and the plain of area A) = 85 x 1.2 x 0.3 x 0.47 x cos 31 = 12.32778 Wb Flux...

Yes, back EMF is like drag. Yes. Back EMF is not greater than the current producing it, so there is at least some current that flows. Back EMF kind of provides an increasing resistance in the turn of the loop. If you turn the loop clockwise (let me see if I can describe this) the wire on the...