Asked by Joe Mama

how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth

Answers

Answered by drwls
sqrt[1 -(v/c)^2] = 0.8
1 - (v/c)^2 = 0.64
(v/c)^2 = 0.36
v = 0.6 c

60% of the speed of light would be required.
Answered by Joe Mama
Sorry can you explain how you get 0.64? Square rooting both sides? sqrt of 0.8 is 0.89 on the calculator. Please help.
Answered by Joe Mama
Nevermind lol.. you squared it.
Answered by Joe Mama
Nevermind lol.. you squared it.
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