Recent content by nicksbyman

I don't think the magnetic flux is 0. Here is the whole question: As the core of the star collapses to form a neutron star (sorry not neuron, neutron), the electrical conductivity becomes very high. In this case the star's magnetic field lines become frozen to the material of the star and...

I did this problem on this British Physics Olympiad paper and it assumed that when a star bigger than the sun collapses under its own gravity to create a neuron star the magnetic flux stays constant. Please explain Thanks

^I know, but why? Why do you only use the chain rule when the variables disagree?

I don't think I fully understand implicit differentiation. I have read my textbook and watched many videos, and I think I will get an A on my test on this solely by memorizing the rules, but I would really like to understand this topic. From what I know, you are supposed to use implicit...

Sammy = Legend + 2 Ok, so one last question. In precalc we NEVER were allowed to use cos(x)*tan(x) = sin(x) in our proofs. (Now I understand why.) Nevertheless, theoretically, if we wanted to, could I have used cos(x) * tan(x) as a substitute for sin(x) in a proof as long as I specified the...

OK. So far I think I have a little more understanding. Basically, Sammy you're a legend because you have explained the identity thing and I now know why we weren't allowed to substitute cos(x) * tan(x) for sin(x) in trig proofs. I am still confused about my second question. My book used the...

The guy above you said it is equal to cos10z

I just typed into wolframalpha: "derivative of sin(10z)"and it told me the answer is 10cos10z

Thanks for the replies guys, (sorry about the mistake; I just corrected it) but I'm still confused about both questions. 1. I realize I made the mistake but I still don't understand why I can't multiply the denominator by the cot(x) on the right side of the equation to get cos(x). 2. Are...

Hey guys these aren't math exercises; I just don't understand a couple parts in my textbook. 1. Cos(x)/Sin(x) = Cot(x), but Cot(x) * sin(x) ≠ cos(x). Why? I know tan(x) * sin(x) ≠ cos(x) because during precalculus nobody ever used sin(x) * cot(x) = cos(x) for anything, but I don't know why you...

That's the perfect response :D I just spent the last 15 minutes or so toiling with that question (I'm a slow learner) and I finally got it. Thanks again. P.S. Correct me if I'm wrong, but we aren't dealing with the unit circle here right? We only deal with the unit circle when the radius is 1...

Yes, sorry I copied it wrong. But how did you get that?

Homework Statement 3-2csc(x) = 17 Homework Equations N/A The Attempt at a Solution 3-2csc(x)= 17 -2csc(x) = 14 csc(x) = -7 cscˆ-1(-7) = x x = -.14 radians. This is not the correct answer. The correct answerS ARE 3.28 or 6.24 radians. I am beyond confused. Please help :)...

But I don't want to know how much energy is needed, I only want to know what the potential is.

This isn't a homework problem but is rather me trying to understand a concept. So here it is: My textbook says that because only differences in potential energy are important, only differences in potential (electric potential) are important. How is this reasoning correct? The definition of...