ANSWERS: 4
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The reference feature isn't working, so here it is:
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Nothing very useful I suspect the water is intended to drain out of the bottom, and flow through the pipe to refill the flask. The reality is of coure somewhat different.
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You cannot have a perpetual motion machine on earth a pesky things call gravity and friction.
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It would cause a tear in the space-time continuum through which if somebody went through they could theoretically be confronted by their future self and the entire world could end.
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