Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
물체의 배중률은 물의 배중률과 비교하여 계산됩니다.Mulcheui baejoongnyureun mureui baejoongryulgwa bigyohayeo gyyesan doemnikka.The specific gravity of an object is calculated in comparison to the specific gravity of water.