posted by jenish .
A 2600-pF air gap capacitor is connected to a 9.0 V battery.If a piece of pyrex glass is placed between the plates,how much charge will then flow from the battery?
Calculate the new Capacitance, C', by multiplying the original C by the dielectric constant of Pyrex, k.
The added charge will be V*(C'-C)=
= (k-1)C V
According to one website I found, "The dielectric constant of Pyrex is relatively low, in the range of 4.0 to 6.0" They may have provided you with a value already.