(b) A capacitor is made of three layers A-B-A insulators in parallel. It is known that the capacitor is a round shape with diameter of 50 mm. An electric field E= 9.3 x 10^
V/m is applied to store charge of 25 x 10" C on each plate. By knowing that the
material A has the dielectric constant of 2.3 and the layers distance of A is 4.3 mm
and B is 2.8 mm, determine the dielectric constant of B.
(8 marks)

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.