In class on Friday we learned about voltage and a little about electrical sockets and how they carry voltage. Voltage is a ratio of potential energy to charge measured in volts. Potential energy is measured in joules and charge in coulombs. Although different objects may have relatively similar voltage, the way people feel the shock is dependent on how many coulombs of electrons are carrying the charge of the voltage. An example of this could be a Van de Graaff and power lines. We learned that power lines have a voltage of around 500,000 volts and a Van de Graaff has a voltage of around 400,000 volts. The feeling that we feel from the two are completely different because of the number of coulombs carrying the energy. In a Van de Graaff there are about a millionth of a coulomb while power lines have an infinite amount of coulombs. So in the Van de Graaff you only feel around half a joule of energy while you feel a whole lot more from power lines. The same goes for electric sockets in comparison to the Van de Graaff where there are not as many coulombs carrying the joules so you dont feel a killer shock.