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Knowing the mass and the radius of the Sun one may find the average density of the Sun's material. Estimate the pressure and the temperature of the gas in the middle of the radius assuming, for the sake of simplicity, that the density is constant and that the acceleration due to gravity at this point is one half its value at the surface. What is the proton concentration at this point? |
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Answer» SOLUTION :In this problem,we shall make USE of the fact that the gas pressure is equal to the hydrogtatic pressure, which may be approximately calculated as follows: `p = vecp_(o.) g_(o.)h = VEC(rho_(o.)) (gamma M_(o.))/(2R_(o.)^2) . (R_(o.))/(2)` where the average density of matter is `vecrho_(o.) = (M_(o.))/(V_(o.)) = (3M_(o.))/(4pi R_(o.)^3)` |
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