Genius Thinking on Instagram: "Prof. Walter Lewin, the renowned MIT physicist, demonstrates the concept of thermal expansion through an engaging physics experiment. In his lecture, he shows how materials expand when heated and contract when cooled, illustrating the fundamental relationship between temperature and the physical dimensions of matter. His clear explanation and practical demonstration make this complex concept easy to understand and visually memorable for students and science enthusi

CREATE on Instagram: "In an MIT physics lecture on free fall and weightlessness, Professor Walter Lewindemonstrated the idea in a striking and unforgettable way. He began by holding a stone and explaining that while standing still, his hand applied an upward normal force equal to the stone's weight (mg), keeping it at rest. Then, to show what changes in free fall, he jumped off a table while still holding the stone. During the fall, both he and the stone accelerated downward together under gravi