https://www.pitara.com/tags/physics-basics/Recent content in Physics Basics on Pitara Kids NetworkHugoen-usSat, 13 Jun 2026 21:46:31 +0530https://www.pitara.com/science-for-kids/5ws-and-h/what-does-a-train-whistle-tell-us-about-the-universe/Tue, 26 Nov 2002 15:33:03 +0000https://www.pitara.com/science-for-kids/5ws-and-h/what-does-a-train-whistle-tell-us-about-the-universe/<p>I remember my first visit to the railway station as a child of five. The excitement of the approaching train was an experience I have never quite forgotten. At first I heard a train whistle far away, low and distant. As the train got closer, the sound of the whistle not only increased, it became shriller, and difficult to bear. So much so that I covered my ears in alarm!</p> <p>Once the excitement had passed, I discovered a secret – even with my eyes closed and by just hearing the whistle, I could tell whether a train was approaching or moving away.</p>