A 20 kg helium balloon in the atmosphere has been charged during a thunderstorm. The balloon...

 

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A 20 kg helium balloon in the atmosphere has been charged during a thunderstorm. The balloon is spherical with a radius of 25 m. The charge density of the surface of the balloon is q:(0, 9s) = 109 cos(0,) coulombs-m2. Assume the center of the balloon is at the coordinate system origin and the z- axis points up. Find the electric field in the middle of the balloon. Answer in units of V/m. A 20 kg helium balloon in the atmosphere has been charged during a thunderstorm. The balloon is spherical with a radius of 25 m. The charge density of the surface of the balloon is q:(0, 9s) = 109 cos(0,) coulombs-m2. Assume the center of the balloon is at the coordinate system origin and the z- axis points up. Find the electric field in the middle of the balloon. Answer in units of V/m.