Asolenoidal coil with 21 turns of wire is wound tightly around another coil with 350 turns. the inner solenoid is 25.0 cm long and has a diameter of 2.50 cm . at a certain time, the current in the inner solenoid is 0.120 a and is increasing at a rate of 1700 a/s. for this time, calculate;

(a) the average magnetic flux through each turn of the innersolenoid;
(b) the mutual inductance of the two solenoids;

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0