John, Jane, and Joe are twins and were all born 70 years ago (in Earth's frame of reference). John spent his life in the same city. Jane spent her life in a car moving at 30 m/s. Joe spent his life on a jet plane moving at 300 m/s. (Don't ask me how they did this.)
How much younger are Jane and Joe than John?
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John, Jane, and Joe are twins and were all born 70 years ago (in Earth's frame of reference). John s...
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