A pressure regulator application on his computer or a station nearbye
Well potential energy is energy that is in a object while its not moving so i would go your third option
The answer is (d.) display and pilot light
An automatic drip coffee maker displays two output from the digital controller; the time and the light or output signal. According to the US Patents publication, an automatic drip coffee maker includes a timer circuit. It's to provide pre-selected time for the activation and deactivation of the coffee maker.
