Recent content by dowjonez

what is the electric field 1m away from a 100 watt light bulb i know that the power of the light bulb 100 watt = volts x amps so if the light bulb is a standard 120 volts then the electric field would be V / r im not sure about this because i know the electric field radiating...

yes that's what it says in the question. I am thinking that the x1 and x2 coordinates must be the displacement. So at time 0 neither are displaced. Also it was given that the mode of motion for the system was a stretching mode.

consider two different masses m1 and m2. They are connected together by a spring. Assuming the spring has a spring constant k. Assume the equilibrium positions are x1= 0 and x2 = 0. Find the period of oscillation. I know the the angular frequency is a function of both masses not just one...

but [B] = N / A * m

k = 2pi / lamdba w = 2 pi V / lamba So B = 1/V ( Z X E) B = 1/ [ m / s ] ( Z X E ) [E] = [q] / [E0] [ R^2] [E] = [C] / [C^2/ Nm^2] [ m^2] = [N / C] B = [s / m] * ( Z x [N / C])

B = k / w ( Z x E) Check this equation by deriving the units for B w = omega Z = z hat

A thin homogeneous rod hsa length L and mass M. Initially the rod is vertical at rest on a frictionless surface. The rod is given a slight push and begins to fall in the gravitational field. 1) write an expression for the kinetic energy T of the rod as functions of M,L,g, theta and d theta/dt...

yeah i understand that now. I still don't get why the total inertia is 1/3(Ix + Iy + iz) though

Hi i have to give a presentation on an example of the defining equation for the moment of inertia of a thin spherical shell. I have to follow the example in my book "elements of Newtonian mechanics". I get most of it but there are a couple steps that the book skips that i cannot. I was...

the bathroom scale measures the normal force upwards on the person. The normal force changes during acceleration. that's all i know

The question is right. im sure the mass isn't changing, but the way the scales reads it is changing because its being accelerated

i don't know why I am stuck on this question. It seems so easy, its making me sick. question: A man mounts a bathroom scale positioned on a skateboard such that it can roll without friction down an inclined plane of angle theta. He stands on the scale and reads off his weight as he is...

so a bullet of mass m is fired into a blockof mass M sitting on a frictionless table. In the first case the block has a wall directly behind it. The bullet travels a distance D into the block Now the bullet is fired again but the wall is removed, how far will the bullet travel now when the...

My teacher in class told me that the electric field of a equally charged object is greater at sharp points, he never explained why and i don't really understand it. For example if a knife was a charged object the electric field would be greatest at the point of the blade. Im thinking...

I have already got help with figuring this out. But i seem to be getting something wrong so maybe someone can check this over and tell me what I am doing wrong Q) find the angular momentum of a cone with heigh H and radius R now i was helped and told Rc = int (x)dv / int dV...