Recent content by danilo_rj

That's a nice idea, I haven't thought that. Well, I found the current over the resistor of 1 ohm as being I = 0.1904 A. I would appreciate If you could check this answer for me.

Homework Statement http://i634.photobucket.com/albums/uu67/danilorj/circuito.jpg Above is the picture of the circuit I'm trying to solve. The problem asks to find the current over the resistor of 1 ohm. Homework Equations The Attempt at a Solution Well, I found the equivalent...

Show that the energy variation tax issued by a particle is : dE/dt=q^2*a^2/(6pi*E0*c^3) , a-> the acceleration of the particle.

what does this red card mean?

nobody knows...

I've got a problem from Irodov. There are two stationary fields of force F=ayi and F = axi + byj, where i and j are unit vectors of the x and y axes, and a and b are constants. Find out whether these fields are potential. But how do I know that a field is potential? I've read that I have to...

Ok. So I have to suppose that the beggining and the ending of the motion is at a same plane.

what is said in the problem is only this, there is no picture.

A body of mass m is thrown at an angle alpha to the horizontal with the initial velocity v0. Find the mean power developed by gravity over the whole time of motion of the body, and the instantaneous power of gravity as a function of time. I didn't understand why delta r is orthogonal to mg...

I've got a problem here from Irodov (it is a very well known physics book). 1.121) A body of mass m was slowly hauled up the hill by a force F which at each pont was directed along a tangent to the trajectory. Find the work performed by this force, if the height of the hill is h, the length of...