The external power efficiency of a planar gaas led is 1.5% when the forward current is 50 ma and the potential difference across its terminals is 2 v. Estimate the optical power generated within the device if the transmission factor at the coated gaasair interface is 0.8.

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

Fluids at rest possess no flow energy. a)- true b)- false

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.