August 2021 0 15 Report
На электроплитке мощностью Р =1200 Вт нагревается до кипения 3 кг воды за 25 мин.Начальная температура воды 20градусов С, удельная теплоемкость воды с =4200 Дж/кг. Определите КПД установки.
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