Two insulating plates are both uniformly charged in such a way that the potential difference between them is $$V_2 - V_1 = 20\,V$$. (i.e. plate 2 is at a higher potential). The plates are separated by $$d = 0.1\,m$$ and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2? $$(e = 1.6\times 10^{-19}\,C, m_e = 9.11\times 10^{-31}\,kg)$$