December 2021 0 3 Report
На сколко градусов нагреетсься свинцовый шарик, если упадет с высоты 140 м на стальную плиту? Вся механическая енергия превратитса в тепловую. с=0.13кДж/кг*градус цельсия,g=10Н/кг
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