A0.5 mhz antenna carried by an airplane flying in air over the ocean generates a plane wave that is normally incident upon the air-water interface. the amplitude of the incident electromagnetic wave is 3 (kv/m). the airplane is trying to communicate with a submarine which is submerged below the ocean surface. the submarine's receiver requires a minimum signal amplitude of 0.01 (mu v/m). ocean water has the following material properties epsilon _r = 81 mu _r =1 sigma = 5 s/m from this information, what is the maximum depth d of the submarine for which successful communication is possible?
unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.
x=int(input("enter a number: "))