(a) Find E in the plane z = 0 that is produced by a uniform line charge, rhoL, extending along the z axis over the range −L < z < L in a cylindrical coordinate system. (b) If the finite line charge is approximated by an infinite line charge (L → [infinity]), by what percentage is Erho in error if rho = 0.5L? (c) Repeat (b) with rho = 0.1L.

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

On a average work day more than work place firs are reorted

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0