Not everything that can happen does happen – reformulating physics as laws about the impossible
22 Jun 2021
Taken from the June 2021 issue of Physics World where it first appeared under the headline "Learning from the impossible".
Philip Ball reviews The Science of Can and Can’t by Chiara Marletto
Alternative reality If a lifeboat is never used, because the ship it is on never sinks, is it still a lifeboat? (Courtesy: iStock/Tramino)
If a 1 kg mass is dropped from a height of 100 m, what is its velocity when it hits the ground? My e
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