sphys4
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Homework Statement
A spaceship moves past you at speed v. You measure the ship to be 300 m long, whereas an astronaut on the ship measures a length of 445 m. Find v.
The Attempt at a Solution
I tried to substitute my numbers into L1=Lsqrt(1/(v^2/c^2)) and keep getting a negative wrong answer!
445=300sqrt(1-(v^2/3E+8^2)) ... what am i doing wrong?