The density of Venus; whether the Venus has iron core or not.

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Chapter 6, Problem 36QAP

To determine

The density of Venus; whether the Venus has iron core or not.

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Assume that Venus has an isothermal atmosphere with a surface temperature of 750 K. The surface pressure of Venus is 90 times the Earth's surface pressure which is about 1013mb. Also assume that the carbon dioxide dominant atmosphere of Venus is photodissociated and oxygen atoms are produced. These oxygen atoms stop the solar wind at the ionopause distance where the atmospheric pressure of Venus and the dynamic pressure of the solar wind are in balance. Accordingly, calculate the lonopause distance of the planet Venus if the solar wind density is 7 #/cm² and solar wind speed is 410 km/sec.

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What is the escape velocity is km/s from Venus' exosphere, which begins about 202 km above the surface ? Assume the gravitational constant is G= 6.67 x10-11m3 kg-1s-2, and that's Venus has a mass of 5.2e+24 kg and a radius of 6500.0 km