Recent content by Zell2

Yes that's the circuit. I need the phase of the voltage across the resistance, (no direction specified), with respect to the voltage source. Sorry about the lack of clarity in the first post. I'm a bit confused about the direction. The voltage across the resistor in the direction opposing...

That's right.

Try letting u=x+1

The negative sign came from: V[SIZE="1"]R=RV/(R+jwL-j/(wC)) so I thought: phase(V[SIZE="1"]R)=-phase(R+jwL-j/(wC)) Is this right? Thanks

Homework Statement There is a circuit with an alternating voltage source and a capacitor (capacitance C) an inductor (inductance L) and a resistor (resistance R). The resistor has a potential V[SIZE="1"]R marked across it. Calculate the magnitude and phase of the voltage V[SIZE="1"]R...

So what's the realtionship between integrating and differentiating?

What integrates to give ln(x)? (How is it defined?) The nth polynomial bit will probably become clearer once you've written down a few of the derivatives.

My mistake sorry, meant phi. I think phi's only going to be zero in a special case, for most values of a,b,c,w it's going to be non-zero. Does anyone have any other suggestions? The second version is the one that works in the differential equation but I still can't see why the first one...

One has a plus thi one has a minus thi for some reason.

Is this is right? Since the bullet and the pendulum remain together, I'd have thought the kinetic energy of the bullet/pendulum together would only be a fraction of the kinetic energy of the bullet (the rest being dissipated as heat). If the original poster knows that the kinetic energy of...

Homework Statement I'm trying to find a particular integral to the differential equation on the attatched image, but I come up with two slightly different answers depending on the method I use. I suspect the problem (if it's not just me being very thick and making a silly algebra error) is the...

Thank you,

So even though the angular momentum vectors before are through different points you can add them like scalars to give the total angular momentum (presumably because they are parallel) ? thanks

Oh ok, how would this change if the sphere is spinning? Thanks

So then total moment of inertia= I + i + Ma^2 using the parallel axis theorem