 I have a steel scale that I've placed like you see in the video. I've pressed one end of the scale so that it does not fall off the table. And I've attached three iron nails. I've stuck them with wax just like you see in the video. And what I'll do is, what I'll do now is I will heat one end of the scale. And I want you to predict, predict which nail, which iron nail will fall first. Make a prediction. Alright, let's see. And the scale is heating up. There you go. One nail fell. The nail closes to the flame. Let's continue heating. Alright, and now the middle, the nail in the middle fell. Why did this happen? Why did the nail closest to the spot where we were heating? Why did that nail fall first? Think about it.