When a certain air filled parallel plate capacitor is connected cross a battery, it acquires a charge (on each plate) of 110 micro Columbs. While the battery connection is maintained, a dielectric slab is inserted into and fills the region between the plates. This results in the accumulation of an additional charge of 240 micro Columbs on each plate. What is the dielectric constant of the dielectric slab? so I have Q1=110 micro Columbs and Q2= 240 micro Columbs;E= 8.85419e-12 C^2/N*m^2; and Air= 1.00054 which is believe is K1 I just dont know what equation to use or how to go about this problem in general.