Вопрос школьника по предмету Физика
20 БАЛЛОВ, СРОЧНО
1. Масса радиоактивного изотопа углерода С614 в старом куске дерева в расчёте на 1 г составляет 0,25 массы этого изотопа в живых растениях. Возраст дерева равен примерно
1) 1425 лет
2) 2850 лет
3) 11400 лет
4) 22800 лет
Ответ учителя по предмету Физика
Ответ:
22800лет
если не правильно прости
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