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Physics, 29.01.2020 04:50 oomale

In january 2006, astronomers reported the discovery of a planet comparable in size to the earth orbiting another star and having a mass of about 5.5 times the earth's mass.
it is believed to consist of a mixture of rock and ice, similar to neptune. take mass earth=5.97x10^24 kg and radius earth=6.38x10^6 m. if this planet has the same density as neptune (1.76 g/cm^3), what is its radius expressed in kilometers?

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