When one light in a string of holiday lights goes and rest of the string then also goes out what type of circuit is it?
series
parallel

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.

see earlier answer

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

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