How fast must a meterstick travel

Reference no: EM1358648

Q. 1.How fast must a meterstick travel to you in the direction parallel to the stick so that its length as measured by you is 70cm.

2.A spaceship travels to a star 110 ligth-years away at a speed of 250000000m/s.How long does it take to get there

a.as measured on earth and

b.as measured by a passenger on the spaceship

Reference no: EM1358648

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