In Fig. 23-45, a small, nonconducting ball of mass m =1.4 mg and charge q = 2.9 x 10-8 C (distributeduniformly through its volume) hangs from an insulating thread thatmakes an angle θ = 44° with a vertical, uniformly chargednonconducting sheet (shown in cross section). Considering thegravitational force on the ball and assuming the sheet extends farvertically and into and out of the page, calculate the surfacecharge density σ of the sheet.