A block of mass m is attached to a spring with force constant, k and oscillates at
a frequency f. If the mass is changed to m' = m/2, and the spring force is
changed to k' = 2k, then the new frequency f'of the oscillations would be,

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.