Recent content by vikasagartha

thanks for the help gneill. I think I have it figured out. Rth = 1.884k and Vth = 826mV. I have another conceptual question, if you don't mind. Thevenin vs Norton - I am comfortable with thevenin so I normally find the Vth and Rth and use Vth/Rth = In to then find the norton equivalent. Is...

Second try New procedure: 1) Left 5k resistor in as A and B have no load in between 2) Used three current loops I1, I2, I3 and calculated three currents using a system of equations. Current equations Currents solved * I1=173.91 micro Amps * I2= 8.69 micro Amps * I3= 382.6 micro Amps 3) Found...

Clearly a conceptual misunderstanding. Makes much more sense now. Thanks for pointing it out:)

Homework Statement Ive never done Thevenin equivalents before, and I am not sure if I have removed the correct "load component". Could someone please take a look @ my solution and let me know if I have done this correctly? Thanks in advance! I really appreciate it! Circuit Diagram...

So I tried doing precisely that, I minimized a 'thrust' but the expression I arrive at doesn't look like the perigee...

If I trying to find the optimal point for escape in an elliptical orbit, can I just differentiate the standard escape velocity eqn with respect to r? I know it must be either the apogee or the perigee...is there a better approach?

The escape velocity of a satellite circularly orbiting a large body comes from conservation of energy. Are there any modifications that must be made for the escape velocity of an elliptical orbit? Thanks in advance!

Silly question. Realized my mistake. Sorry. I forgot that the normal to the electric field is in opposite directions when drawing a 'pillbox.' So sorry. Answered my own question.

Im confused by a concept i have run across in Griffiths electrodynamics. E_{out} - E_{in} = \frac{\sigma_{free}}{\epsilon_0} However, in the case of a uniform, circular charge density, \vec{E_{in}} = \frac{\rho r}{3\epsilon_0}\hat{r} \vec{E_{out}} = \frac{\rho R^3}{3\epsilon_0...

I have a general gauss' law/electric field question. In calculating the electric field of a cylindrical shape, gauss' law can be applied to find that the Electric field only points aways from the surface of the cylinder (aka, in the s-hat direction). But this means that there are no field...

Okay, a second question: I watched Chris Tisdell's (youtube) derivation of the solution in two dimensions, and it involves a summation of a sine function (a Fourier series of sorts). In electrostatics, the solution of the equation generates a potential function V, which we get by taking a path...

I am studying Laplace's equation in my electrodynamics course (using griffiths intro to electrodynamics). I am watching a youtube video stepping through the separation of variables method for solving the PDE. It seems to be a common PDE that comes up repeatedly in physics (Helmholtz eqn, Poisson...

Hmm. I am a little confused. Some of the reading that I am doing online is showing me something more like this: A protostar accretes mass until it reaches an equilibrium. Equilibrium can be explained in the following manner: 1. Gravity pulls gas and dust into the core. 2. The core gets hotter...

I understand how conservation of momentum leads to planet formation and planet rotation. However, after studying this model, I have ran into a point of confusion that I cannot find the answer to: Why don't the planets collapse into the sun just as dust particles collapsed inward via...

Hi! I am an student w/ little background in astronomy taking an upper level astro course, and am having some difficulty with basic concepts. Any help is appreciated. Why are cosmic rays so important for the heating of molecular clouds? I read that hard xrays can heat as well, while soft xrays...