If the radius of the neutron star is 85.074 km, what is the average density of a neutron star that has the same mass as the sun but a radius of only 20.0 km? (express your answer in the proper SI unit and without scientific notation)

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A: Solution attached in the photo

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A: SOlution: To define priciple of reflection.

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A: Given: Mass 1,m1=70g=70×10-3kgRadius 1,r1=4.50cm=4.50×10-2mVelocity,v=14m/sMass…