The instantaneous expression for the magnetic field intensity of a uniform plane wave propagating in the +y direction in air is given by: = 4x10−6 cos [10 πt − k0y + π 4 ] (A/m) a) Determine k0 and the location where Hz vanishes at t = 3 (ms) b) Write the instantaneous expression for E

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

What organization and environment is described above?