Consider two identical conducting spheres whose surfaces are separated by a small distance. one sphere is given a large net positive charge, while the other is given a small net positive charge. it is found that the force between them is attractive even though both spheres have net charges of the same sign. explain how this is possible.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.