Given a 7.0 pF air-filled capacitor, you are asked to convert it to a capacitor that can store up to 6.6 µJ with a maximum potential difference of 721 V. What must be the dielectric constant of the material that you should you use to fill the gap in the air capacitor if you do not allow for a margin of error?

Given a 7.0 pF air-filled capacitor, you are asked to convert it to a capacitor that can store up to 6.6 µJ with a maximum potential difference of 721 V. What must be the dielectric constant of the material that you should you use to fill the gap in the air capacitor if you do not allow for a margin of error?