English Diary 2026
0827 Fluid mechanics studies how liquids and gases move and interact with objects. Much of the subject can be understood as a competition among inertia, viscosity, pressure, gravity, and surface tension. 0826 Physics is the fundamental science of matter, energy, and their interactions. The book traces the development of physics from the natural philosophy of the ancient Greeks to classical physics, relativity, quantum mechanics, particle physics, and modern cosmology. Physics also underpins much of modern civilization. Its discoveries have led to electronics, lasers, medical imaging, nanotechnology, energy technologies, weather forecasting, and emerging fields such as quantum computing. Motivation inevitably fluctuates, so we should not simply wait until we feel motivated. Instead, we can maintain our drive by making steady progress, managing our limited energy wisely, and focusing on meaningful results. Even small accomplishments can bolster motivation because a sense of progress...