Recent content by betamu

You have brought great relief to my turbulent mind. Thanks for your input, mcabbage.

Hello, maybe someone is knowledgeable on this sort of thing. I've recently enrolled into a Bachelor of Science in Physics program at Virginia Tech. Someone told me today that they aren't accredited for a Physics Bachelors and now I'm freaking out about whether I should attend or not. I want to...

Thanks for the help the other day. Sorry to get back to this thread so late. My initial answer was correct - I wasn't paying attention to the units used for the answer which were already given by the problem. I had the correct answer, but to the wrong power of 10.

Hm, okay. It wouldn't be solvable with the given information in that case, right? I'll email my professor about it and hope I get something back.

Attached is a screenshot of the problem. It asks for the "maximum average flux" through each turn of the coil. I was thinking the average would be zero, but MP didn't accept that as an answer, either. I'm confused as to what the problem means by "maximum average." Is it asking for the average...

Homework Statement A coil has 460 turns and self-inductance 7.50 mH. The current in the coil varies with time according to i=(680mA)cos[πt/(0.0250s)]. What is the maximum average flux through each turn of the coil? Homework Equations ##\varepsilon_{ind} = N \frac{d\Phi}{dt} ...

Oh alright, I'd never seen that notation before. Thank you both!

Haha wow. Yeah you're right. Well at least I gained some experience in writing out latex code in posting this. Thanks!

I'm unsure what you mean. You're putting the gradient vector and v into one vector together?

Homework Statement [/B] Find the directional derivative of the function at the given point in the direction of the vector v. $$g(s,t)=s\sqrt t, (2,4), \vec{v}=2\hat{i} - \hat{j}$$ Homework Equations $$\nabla g(s,t) = <g_s(s,t), g_t(s,t)>\\ \vec{u} = \vec{v}/|\vec{v}|\\ D_u g(s,t) = \nabla...

Homework Statement The sound source of a ship’s sonar system operates at a frequency of 18.0 kHz. The speed of sound in water (assumed to be at a uniform 20°C) is 1482 m/s. What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling...

That describes the amount of energy lost to friction. You know that this is the only way energy is lost during the motion of the object. Therefore you can say that the final energy of the box will be the initial energy minus the energy lost to friction.