Anon‐conducting spherical shell, with an inner radius of 4.0 cm and an outer radius of 6.0 cm, has charge spread non‐uniformly through its volume between its inner and outer surfaces. the volume charge density ρ is the charge per unit volume, with the unit coulomb per cubic meter. for this shell ρ = b/r, where r is the distance in meters from the center of the shell and b = 3.0 μc/m2. what is the net charge in the shell?

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s