Find at what fraction of the speed of light is lilac moving

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Reference no: EM13685817

The spaceship Lilac, based on the Purple Planet, is 729 meter long, as measured at rest. When Lilac passes Earth, Terrain observers measure its length to be 679 meter. Find at what fraction of the speed of light is Lilac moving with respect to Earth?

Reference no: EM13685817

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