Construct a sequence of real numbers x0, x1 ......  such that any c € [0, 1] is the limit of some subsequence of the sequence you constructed.

A 25pF parallel-plate capacitor with an air gap between the plates is connected to a 100v battery. A teflon slab is then inserted between the plates, filling the gap. What is the change in the charge on the positive plate when the teflon is inserted ? (Teflon k = 2 )