In astronomy (theory Bredikhina FA) form a comet´s tail

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In astronomy (theory Bredikhina FA) form a comet´s tail is due to the pressure of sunlight on the comet particles. Assuming the particles completely black balls, to determine what should be in this case the mass of the comet particles to the radiation pressure is balanced by the force of attraction of the sun. According to the radio astronomy measurements of the cross-sectional area of the particle is 0.5 * 10 ^ -8 cm ^ 2 (temperature of the surface of the sun 5800 K, its radius is 6.95 * 10 ^ 8 m, weight 1.98 * 10 ^ 30 kg.

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Task 50278. Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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