In a popular 1980’s movie, a scientist/tinkerer made a time machine out of a car that traveled back to the year 1955. In order to propel the car through time, it took 1.21 Gigawatts of electrical power. In the movie, a nuclear reaction was used at one point; in another, a bolt of lightning. But what if we used a capacitor instead ? Let’s see how big of a capacitor we’d need! Assuming that all of the required power is expended in 150 ms, and that the capacitor was charged by a 12V car battery, How much capacitance is required ? A typical electrolytic capacitor – one using chemical action to aid in energy storage -has an energy density of 0.5 Joules/gram. Determine the mass of the required capacitor.

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