Recent content by Darth Geek

Thanks. We had been over relativistic effects in chapter 13.1, and this question appeared in 13.2, which is why I was confused about why the course was being so anal about it. I'm questioning him too- the 1.4% that I used was quite a lot to dismiss in a measurement like a De Broglie...

This is less of a strict math problem than me thinking my online teacher is wrong. I will, however, format the question as per PF's requirements, and I think it should be in this forum because it involves my coursework. Homework Statement Essentially, when should I use relativistic...

Homework Statement A circular coil, with radius of 10 cm, and 25 turns, rotates in a constant magnetic field of strength 2.4 T, with the axis of rotation perpendicular to the direction of the magnetic field. (a question about finding the induced voltage- 5.92 V) part C. If the...

Bah. It's from Apex (Not) Learning. I'll mirror it on Imageshack. Here you go. http://img401.imageshack.us/img401/892/ba9416055eb44e21a8ebb2cwy2.th.gif Well whatever the wingspan is, I need another dimension, and Apex is being really anal about not giving me any hints. Would I just use...

Well, the plane is traveling into the field, so I would think the wingspan is the width. So it's the length I don't have. And it's not a conducting rod. The hint said to do the problem as if it was a rectangle circuit, and anyway I don't think there would be any potential difference if it was...

Homework Statement An airplane with a wingspan W = 30 m is flying due north at v = 672 km/h. The Earth's field is 1.210-4 T, due north and inclined q = 42 below horizontal. What is the magnitude of the potential difference between the ends of the wings...

I got the question right. Thanks everyone. :)

Sorry for the double post but I don't see an "edit" button... How do I find the work for each individual process? All I have to go on is the 160 kcal.

So, I just sum up the work done by each of the processes? Sorry, but Apex (Not-)Learning doesn't say much on the subject. I may be able to sift through the cruft that they call notes to see how to do this, though.

Homework Statement An ideal Carnot engine takes in 160 kcal of heat at 110°C and exhausts some of this at 10°C. How much work (in joules) must have been done by the engine? Homework Equations The engine's efficiency is ε = (TH - TL)/TH. The hint tells me that I need to use the First Law of...