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It's probably because it's not taught properly, my own teacher made this same mistake last year when we were learning F=qvBsin(theta) but then I researched it and realised it was wrong. It's funny because he came up with a proof of it thinking theta was the angle between the current and the...

Sure man. Here you go:

It can't be 45 degrees because that's not theta. As you said yourself, the angle theta is the angle between the conductor (on the plane of the page) and the direction of the magnetic field (directly into the page). This means theta=90 degrees. If you still don't get it, I'll draw a diagram to...

Isn't the angle between the conductor and the direction of the magnetic field 90 degrees? The magnetic field is going directly into the page and the conductor lies on the plane of the page.

Re: The Official Tennis Thread fuck yeah!

Re: The Official Tennis Thread djokovic is worth the watch.

Re: The Official Tennis Thread Apparently Federer yelled 'Fucking stop' to Murray across the court during yesterday's match, lol. If this is true, he must have been pissed as shit.

Re: The Official Tennis Thread I guess I agree. It's sad to watch his game deteriorate :(.

Re: The Official Tennis Thread Hope Novak wins, lol.

Re: The Official Tennis Thread What do you guys reckon, was it Federer being a bit off his game tonight or was Murray just too good? tbh I felt as though Federer couldn't end points as well as he usually does e.g. his backhand seemed a bit off tonight.

Re: Potential difference in context of EMFs Glad to help man.

Re: Potential difference in context of EMFs Sorry for the late reply lol, was watching the federer match. Electric potential is a measure of electrostatic potential energy per coulomb of charge. All points within an electric field have a certain electric potential and the work required to...

Re: Potential difference in context of EMFs Voltage or potential difference is a measure of the amount of work required to move one coulomb of charge (a coulomb is the SI unit for charge) from one point in the circuit to another. So say the voltage (in the case of a galvanic cell) is 1.5 V...

Re: 2013 HSC physics marathon Yeah, I just meant applying the mass dilation formula to F=ma: a=F/(m/sqrt(1-v^2/c^2))=F*sqrt(1-v^2/c^2)/m As v->c, a->0.

Re: The Official Tennis Thread lol omg, my dad stopped to see the match point thinking it wasn't going to take that long hahahahhahahahahaha. Eventually, he was like "fuck this" and left.

Re: 2013 HSC physics marathon Yep, the general idea is right. I recommend using equations in your future responses.

Re: 2013 HSC physics marathon Time to revive this bitch. Explain why the speed of light is the limiting speed of any object in the universe.

Re: The Official Tennis Thread This is the second time this year she's lost to zheng jie.

Re: The Official Tennis Thread well.. sam stosur's gone.

Re: HSC 2013 4U Marathon Damn, you're right lol.