Quick Links: HKDSE Physics - Renewable Energy Sources Solar Energy (太陽能): Learn the solar power formula (P = I × A × η) and how to calculate useful power output from solar irradiance for DSE Physics. Wind Power (風能): Understand the maximum wind power formula (P = ½ρAv³) and the relationship between air density, swept area, and wind speed. Hydroelectric Power (水力發電): Master the hydroelectric power formula (P = mgh/t) using mass and volume flow rates. Pumped Storage Systems (抽水蓄能): Discover how off-peak electricity is used to pump water to an upper reservoir to stabilize the power grid during peak hours. Renewable Energy Comparison: Compare the advantages and disadvantages of solar panels, wind turbines, and hydroelectric plants, including environmental impacts and efficiency limits. Study with Billy Sir: Get 5** in HKDSE Physics with comprehensive notes, past paper analysis, and expert exam techniques from a CUHK Physics Master.