<iframe src="https://www.youtube.com/embed/l84X9o_Xtmo" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe> <iframe src="https://www.youtube.com/embed/oGOeWmBnZlY" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe> <iframe src="https://www.youtube.com/embed/H_6RnEf2J3k" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe> <iframe src="https://www.youtube.com/embed/ZSOXPVIRafc" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe>
36. dakikanın başında 1. bileşikte kütleleri genişlettiniz, 2. bileşikte neden genişletmediniz?