PBS Space Time

Perpetual Motion From Negative Mass?

Season 5 Episode 10 | 14m 28s

Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples? The answer? Priceless. Because you could use negative-mass apples to build warp drives, travel in time, and construct a perpetual motion machine. In fact that last one will be today’s actual challenge question.

Aired: 02/11/19

Rating: NR

Video has closed captioning.

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