Some types of storage tanks are exempt from the federal regulations on USTs, including A) tanks that store heating oil burned on the premises.
B) tanks that hold less than 200 gallons.
C) farm and residential tanks that hold 2,000 gallons or less of motor fuel used for noncommercial purposes.
D) all of these.

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.