No. 17,988 in Russian
физике
"Физике" is the dative or prepositional case form of "физика," meaning "physics" in English.
In a sentence
Я заинтересован в физике, особенно в квантовой механике.
I am interested in physics, especially quantum mechanics.
In this sentence, 'физике' is in the dative case, used as the object of interest ('заинтересован в').
Вчера на уроке физике мы изучали закон Ньютона.
Yesterday in the physics lesson, we studied Newton's law.
Here, 'физике' is in the prepositional case, indicating the topic discussed ('на уроке').
Моей сестре особенно нравится лабораторная работа по физике.
My sister especially enjoys the lab work in physics.
In this sentence, 'физике' is in the dative case, indicating the field of the referred lab work (following 'по').
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