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Physics, 03.06.2021 09:10 ajbrock1004

В кусок льда массой 130 г и плотностью 900 кг/м3 вморожена монета массой 10 г и плотностью 8900 кг/м3. Этот кусок льда с монетой, имеющие температуру 0 ℃, помещают в сосуд, в котором находится 400 мл воды
с некоторой начальной температурой t. Теплообменом с окружающей
средой можно пренебречь. Лёд с монетой сначала плавают, не касаясь дна
сосуда. Удельная теплоёмкость воды 4200 Дж/(кг ∙ ℃), удельная теплота
плавления льда 330 кДж/кг, плотность воды 1000 кг/м3 ,ускорение свободного падения = 10 м/с2
Какой должна быть минимальная начальная температура воды t, чтобы
кусок льда вместе с монетой опустился на дно после наступления
теплового равновесия? Ответ выразите в градусах Цельсия и округлите
до целого числа.
ПОЖАЛУЙСТА С ПОДРОБНЫМ ОТВЕТОМ

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