Recent content by mrknowknow

A capacitor in an AC circuit. What is the amplitude of the current?? I=dQ/dt

Vc=Vcos(wx) Ic=\omegaCVcos(\omegax+\pi/2) ?

Firstly, thank you paisiello for taking the time out to reply. This particular procedure in the lab just consisted of the capacitor and the power supply. I don't know if this is right but I divided the voltage by the capacitive reactance to get 3.6E-3 (5.59V)/(Xc) Xc=1/wC...

A capacitor in an AC circuit. What is the amplitude of the current?? Homework Statement I really do not know how to approach this problem. What confuses me is that when calculating the % error I'm suppose to have a theoretical or accepted value and a measured value. So how do I determine...

mg10sin35 - mg5.38sin35 ??

From what you're saying I would think to the equation I posted in #4. I don't understand the last line, I'm stumped.

Homework Statement A mass,M, is fixed at a position of 3m. Another mass, 2M, is fixed at the position -1m. What position(s) can a third mass, 3M, be placed so that it is in equilibrium. Homework Equations The only thing I could think of is M(3)+2M(-1)+3Mx=0 The Attempt at a...

I'm thinking but nothing comes to mind!

I don't know how to set up the equation. A tutor at MIT on InstaEdu couldn't even figure it out. The answer is .211 m but I don't see how my professor got that.

so would it be 1/2mv^2=1/2kx^2+1/2mv^2

Homework Statement A problem like this is on my final tomorrow and I can't seem to get past part C...Please Help! A .321 kg, .27m radius thin shelled ball rolls (starting at rest) 3.82m from the top down a 35° 10.0m long incline without slipping. After the 3.82 m, the incline becomes...

C is same height as P so it's 0 below P C is (O-P) C is s below A I just left our school's tutoring center and I just wasted another 2 hours because they weren't able to figure it out either.

I don't see how it's not L-D. I'm sorry maybe I'm not visualizing it right. I attached a picture that looks like our experiment.

L-d ??

But I'm trying to find the theoretical speed of the bob at position C (string is horizontal from the lower rod to the mass) and the theoretical angle at position D (string starts having slack)