Calculate the average density of the Sun’s matter if its mass is 2 • 10 ^ 30 kg, the radius is 7 • 10 ^ 5 km.

decision
p = m / V; V = 2nR ^ 2/3; p = 3m / 4nR3 = (3 * 2 * 10 ^ 30) / (4n (4 * 10 ^ 8) ^ 3) = 1.4 * 10 ^ 3 km / m3

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