The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting area of the filament is 78 cm2, and its emissivity is 0.65, what is the power output of the light bulb

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.