Manypeoplehavewonderedwhatmakestheoceansriseandfallonth...
問題詳情:Manypeoplehavewonderedwhatmakestheoceansriseandfallontheword’sbeachestwiceaday.ThosetidesarecausedbytheforceoftheMoon’sgravityandtherotation(自轉)oftheEarth.Gravityactsonthecenterofanysolido...