Why are diffracted beams formed only at incident beam angles that satisfy bragg's law, and not at other orientations? at what 20 value would the 220 peak for fcc nickel be formed if a cu kα1 x-rays beam was used?

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

Burgers vector is generally parallel to the dislocation line. a)-true b)-false