An air-filled spherical capacitor is constructed with an inner-shell radius of 6.90 cm and an outer-shell radius of 15.0 cm. (a) (b) (c) Calculate the capacitance of the device. 5 \\ % L J What is the formula for the capacitance of a spherical capacitor? How does it depend on the inner radius and outer radius of a spherical shell? Be sure to convert the radii from units of centimeters to meters in your calculation, Also, be sure to convert the final answer from farads to picofarads, where "pico" (metric prefix p) means 1 x 10712, pF What potential difference between the spheres results in a 4.00 pC charge on the capacitor? What If? What would be the length (in cm) of a cylindrical air-filled capacitor with the same inner and outer radii as the spherical capacitor if it were to have the same capacitance as the spherical capacitor? \" |cm