# Recent content by squeak

1. ### Magnetic field of a moving charge

Homework Statement A negative charge q = −3.20×10-6C is located at the origin and has velocity υ⃗ =(7.50×104m/s)ι^+((−4.90)×104m/s)j^. At this instant what is the magnetic field produced by this charge at the point x = 0.230 m , y = -0.300 m , z= 0? Give the x, y and x components Homework...
2. ### Gauss' Law vector form problem

Thanks! I'll try and do it that way as i think thats the way we're supposed to! Thank you so much for all of your help.
3. ### Gauss' Law vector form problem

I often get the vector part wrong - so for when x = 4m would E due to q = kq/r2 where r = √(22+42) but that would be in-between the x/y directions. Would I then resolve this is the x direction by taking Esin(θ) where θ=arctan(4/2). And to this term i finally add the field gained in part 1).
4. ### Gauss' Law vector form problem

So could i just find the electric field of the point charge using kq/r2 and add it to the electric field found by using Gauss law?
5. ### Gauss' Law vector form problem

Homework Statement (a) A spherical insulating shell of radius R = 3.00 m has its centre at the origin and carries a surface charge density σ = 3.00 nC/m2. Use Gauss’s law to find the electric field on the x axis at (i) x = 2.00m and (ii) x = 4.00 m. Give you answers in the vector form. (b) A...
6. ### Orbiting satellite

Thank you so much. That all makes sense now.
7. ### Orbiting satellite

Homework Statement Compute the speed and the period of a 240 kg satellite in an approximately circular orbit 610 km above the surface of Earth. The radius and mass of Earth are RE = 6400 km and ME = 6.0 × 1024 kg respectively. [5 marks] Suppose the satellite loses mechanical energy at the...
8. ### Waves and Optics

Homework Statement An unpolarised light beam is shone horizontally through a cubic tank filled with weakly scattering fluid. Can vertically polarized light leave through the sides that are parallel to the beam’s propagation direction? Homework Equations The Attempt at a Solution My thinking...