"Version: 202112"--Title page verso.Includes bibliographical references.8. Continuum forces -- 8.1. The basic concepts of fluid mechanics -- 8.2. Drag forces -- 8.3. Bubbles in fizzy drinks -- 8.4. Magnetic-braking : the terminal velocity of a magnet falling in a tube of a non-magnetic metal9. Why is the sky blue? -- 9.1. Quantifying light intensity : subjectively and in absolute terms -- 9.2. …