An astronaut travels from a distant star to the earth at
An astronaut travels from a distant star to the Earth at speed0.995c. The astronaut ages 4.9 years through his journey. What the distance from the star to the Earth is as gauged by an observer on the Earth?
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two slits are illumined by a 621nm light the angle among the zeros-order bright band at the center of the screen and
the laws of reflection and refraction are the same for sound and for light the speed of sound is 340 ms in air and 1510
a small blob of putty of mass m 800 gram falls from the ceiling and lands on the outer rim of a turntable of radius r
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an astronaut travels from a distant star to the earth at speed0995c the astronaut ages 49 years through his journey
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a 250 kilogram workbook or textbook is forced against a horizontal spring of negligible mass and force constant 250 nm
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optimums prime is flying straight up at 81ms when he accidentally drops his mega-ray blaster and it falls 85 m to the
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