2. A point source of 60Co gamma rays emits equal numbers of monoenergetic photons of 1.17 MeV and 1.33 MeV, giving a flux density of 5.7 x 109 photons cm-2 sec-1 at a specified location. What is the energy flux density there, expressed in erg cm-2 sec-1 and in J m-2 min

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.