Consider a water tank at a certain height above the ground. At the bottom of this tank there is a hose.The pressure at the end of the hose can represent ____. The water in the tank represents ____. The more water in the tank, the ____ the charge, the more pressure is measured at the end of the hose.We can think of this tank as a ____, a place where we store a certain amount of energy and then ____ it. If we drain our tank a certain amount, the pressure created at the end of the hose goes ____. We can think of this as ____ voltage, like when a torch gets dimmer as the batteries run down.

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