There exists a sheathed underground power cable which has a conductor which is solid aluminum with a diameter of 0.11 inches. The dielectric around the conductor is teflon and has a thickness of 0.25 inches and the soil is considered to be dry soil with a relative permittivity of about 3.25. This conductor can be considered to be infinitely long If there is a surface charge of p. = 35 C/m² on the outer surface of the aluminum conductor please (a) Find the electric field intensity and electric flux density on both sides of the alu- ininum/teflon boundary (b) Find the electric field intensity and electric flux density on both sides of the teflon/soil boundary

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false