When a rubber band is pulled back on your finger but not yet let go how is that potential energy?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.

Which sections of the heating curve illustrate this process?