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The radius of Earth is 6370 km in the Earth reference frame. The cosmic ray is...

The radius of Earth is 6370 km in the Earth reference frame. The cosmic ray is moving at 0.860 c0 relative to Earth. Part A In the reference frame of a cosmic ray how wide does Earth seem along the flight direction? Part B In the reference frame of a cosmic ray how wide does Earth seem perpendicular to the flight direction?

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