"Ohms Law: Ohm's Law is given by V = IR, where I is the current,V is the potential difference measured across the resistance and R is the resistance of the conductor in Ohms. A resistor is like a water wheel: it slows down the flow of water but turns it into work (heat). A battery is like a pump. It moves water uphill to a certain elevation (voltage). Likewise, a voltage drop is like a drop in elevation."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.