1. Optical Lenses and Magnification – Calculating the power of a system combining converging and diverging lenses. 2. Gas Laws and Pressure Changes – Determining new gas pressure after volume and temperature adjustments using ideal gas law. 3. Photoelectric Effect – Explaining how frequency and intensity of incident light affect electron emission. 4. Nuclear Physics and Radioactive Decay – Calculating energy released in alpha decay of radium-226 and half-life applications. 5. Simple Harmonic Motion – Analyzing phase relationships and energy transfer between coupled pendulums. 6. Gravitational Fields and Orbits – Determining orbital velocity and feasibility of an elliptical orbit for a space probe around Mercury.