11 September
Complete bilingual (English + Tamil) TNPSC study notes on Heat and Thermodynamics — temperature scales and conversions, anomalous expansion of water, specific heat capacity, latent heat, thermal expansion, the three modes of heat transfer and the four laws of thermodynamics, with 15 key points, 5 practice MCQs, memory tricks and previous year questions for TNPSC Group 1, 2, 2A, 4 and VAO.