Find out the dielectric constant of the wax
An air-filled parallel-plate capacitor has a capacitance of 1.4 pF. The separation of the plates is doubled and wax is inserted between them. The new capacitance is 2.4 pF. Find the dielectric constant of the wax.
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A charged isolated metal sphere of diameter 12 cm has a potential of 8500 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
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A light-year is the distance light (speed = 2.998 108 m/s) travels in one year. (a) How many meters are there in 16.0 light-years?
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