13) m2 = −4,19 × 103 × 2,35 × 15/(2,5 × 102 × (293 + 15 − 503)) = 3,03 кг.
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13) m2 = −4,19 × 103 × 2,35 × 15/(2,5 × 102 × (293 + 15 − 503)) = 3,03 кг.