A uniform charge density of 500.0nC/m3 is distributed through a spherical volume of radius 16.0cm. A cubical surface with sides of length 4.00cm is located completely inside this sphere. What is the electric flux through this cubical surface

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.