An inductor with l = 9.80 mh is connected across an ac source that has voltage amplitude 41.5 v . what value for the frequency of the source results in a current amplitude of 4.50 a ?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.