Z1 is a star system that is 11.90 light-years away from Earth. Astronauts in an advanced space ship travel from Earth to Z1 at high speed, and they age only 6.50 years during the journey. (a) How fast were the Astronauts travelling? (b) The ship was launched from Earth by turning trash into 100% energy. How much trash must have been converted into energy to launch the 2.0 x 109 kg ship to this speed?

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Z1 is a star system that is 11.90 light-years away from Earth. Astronauts in an advanced space ship travel from Earth to Z1 at high speed, and they age only 6.50 years during the journey.

(a) How fast were the Astronauts travelling? (b) The ship was launched from Earth by turning trash into 100% energy. How much trash must have been converted into energy to launch the 2.0 x 109 kg ship to this speed? 

Expert Solution
Step 1

Distance between Earth to Z1:d=11.90 lyd=11.90×365×24×3600×3×108=1.125×1017mT=6.50 yrs= 6.50×365×24×3600=2.05×108 mlet speed of the astronaut is v

Step 2

a)

d=vγTdT=v1-v2c2dT2=v21-v2c2dT2-dT2v2c2=v2v2=dT21+dT21c2v2=1.125×10172.05×10821+1.125×10172.05×10821(3×108)2v2=1.125×10172.05×10824.35v=2.59×108  m/s

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