One example of current electricity are transmission lines. These bring electricity from power stations to individual houses.
It would be the 2nd one because the higher the farther away from the equator. <span />
Its 1.6 kg
Remember
E = 1/2mv^2 is the kinetic energy of the ball. The energy is given to you so you need to solve for mass. Rearranging the equation gives you 2E/v^2 = 1.6
