Capacitor

1. Kappa

For

,

if we plot C vs 1/d, then the slope

,

and therefore,

,

and

.

Since the dielectric constant is a constant, the first term is zero.

2. A

For the uncertainty of A, since

,

we have

.

3. Pressure

Since

P = W/A,

then assuming the weight is a constant, we have

.