Chapter Heat 🔥🌡️| Lecture3 I Class 10th | Maharshtra board | By professor295🇮🇳

This video covers the third lecture of the fifth chapter of the Class 10 Maharashtra Board physics curriculum, focusing on concepts related to heat. Here is a summary of the key topics discussed Dew Point and Humidity: The speaker explains that humidity is the amount of water vapor in the atmosphere, which influences daily weather. When the air becomes saturated with moisture beyond its limit at a specific temperature, it forms water droplets (0:33–6:07). Heat Exchange: This section describes how heat transfers between hot and cold objects until they reach thermal equilibrium, using examples like hot tea in a room and melting ice (7:01–12:45). Units of Heat: The speaker defines the SI unit of heat as the Joule and the CGS unit as the Calorie, noting the relationship between them and how food energy is measured (12:51–14:40). Specific Heat Capacity: The lecture introduces the concept of specific heat capacity (denoted by C) and provides the formula for calculating heat energy: Q = m * c * ΔT, where m is mass and ΔT is the change in temperature (15:00–16:32). Practical Application: The video concludes by working through a numerical example using the formula to find the heat energy required to raise the temperature of 5 kg of water from 20°C to 100°C (16:36–19:20).