1. Sound wave properties, ultrasound depth calculations, and radioactive contamination risks. 2. Seismic wave behavior, electrical power calculations, and velocity-time graph interpretations. 3. Light absorption in different media, color perception effects, and tracer applications in leak detection. 4. Nuclear decay processes, polonium-210 radiation effects, and half-life calculations. 5. Electron transitions in atoms, redshift in distant galaxies, and nuclear fusion probability analysis. 6. Transformer operations, energy efficiency in power grids, and gravitational potential energy experiments.