At which point would most of the pendulum's potential energy have been transformed into kinetic energy?

If element x has 99 protons how many electrons does it have

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

If the area of a square has increased by a factor of 16, by how much has each side increased?