g A certain superconducting magnet in the form of a solenoid of length 0.440 m can generate a magnetic field of 9.10 T in its core when its coils carry a current of 80 A. Find the number of turns in the solenoid.

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.