Recent content by musicfairy

So would it be something like this? 4(y2 − y +1/4) − 3 − 1 4(y− 1/2)2 − 4

So far all the completing the square problems I've done do not have a coefficient in front of the highest power. This one has me stuck. :( What should I do to complete the square?

A spatially uniform magnetic field directed out of the page is confined to a cylindrical region of space of radius a as shown above. The strength of the magnetic field increases at a constant rate such that B = Bo + Ct, where Bo and C are constants and t is time. A circular conducting loop of...

I can't find anyway to do that. :( Would I divide everything by 10?

The teacher asks to choose u, find u. My textbook doesn't show any example of problems involving inverse trig so I'm stuck trying to figure out how to make the denominator look similar to the derivative of arctan. Can you give me more hints?

I need help with this problem. As of now I have absolutely no idea how to do this. I know that I should use inverse tan, but no further than that. What should u equal and how could I get the numerator to 1? Please explain so I can do similar problems later on.

Thank you for your help.

Ok, I see. V = −∫E∙dr = −ax2/2 + bx = −20x2 − 4x When x = 0.5 V = −7, so B is the answer. Is this correct?

How do I do #2?

So you mean that in #7 B is the correct answer since the potential lines are the closest?

I need some help on those multiple choice questions that I'm using to learn the concepts. Some of them I know how to do and needs someone to check my work. Other ones I need hints so I know how to start. 1. Three ½ μF capacitors are connected in series as shown in the diagram above. The...

Can someone please check my answers and explain if I get any wrong? 1. A point charge +Q is inside an uncharged conducting spherical shell that in turn is near several isolated point charges, as shown above. The electric field at point P inside the shell depends on the magnitude of (A) Q...

I got it. Thanks.

A rod of uniform linear charge density λ = +1.5 x 10 5 C/m is bent into an arc of radius R = 0.10 m. The arc is placed with its center at the origin of the axes shown above. a. Determine the total charge on the rod. b. Determine the magnitude and direction of the electric field at the center...

Thanks. That will go on my favorites list. But it doesn't have a semi circle. Any ideas where I can find that?