Question

A 20-cm-radius ball is uniformly charged to 76nC.

Part A

What is the ball's uniform charge density (C/m3)?

Express your answer using two significant figures.

Part B

How much charge is enclosed by spheres of radii 5, 10, and 20 cm?

Express your answers using two significant figures. Enter your answers numerically separated by commas.

Part C

What is the electric field strength at points 5, 10, and 20 cm from the center?

Express your answers using two significant figures. Enter your answers numerically separated by commas.