What is the reason that a fixed pulley makes work easier

Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. the electric field at a point p, which is 0.50 m from the center of the sphere, is 15,000 n/c and is directed radially outward. what is the maximum magnitude of the electric field due to this sphere

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

What are the applications of electromagnetic waves