1-1 Energy and Temperature (Part 2) скачать в хорошем качестве

1-1 Energy and Temperature (Part 2)

The quantity that connects "energy transfer" to "temperatue change" is "heat capacity". In this video, I will explain and demonstrate calculations that involve heat capacity. 0:00 Opening 0:48 Unit of energy: Joule 1:13 Heat capacity 2:31 Specific heat capacity 3:40 Summary 5:07 Example 1 8:35 Example 2 Show all topics https://bit.ly/physics_concepts_eng ------------------------------ Download examples: Chinese http://bit.ly/phy_con_ex_1-1-2_c English http://bit.ly/phy_con_ex_1-1-2_e ------------------------------ Supplementary information: [Units of energy] Two common units of energy are joule (J) and calorie (cal). 1 joule is defined as the work done by applying a force of 1 N on an object over a distance of 1 m (we will explain what work is in the next unit); 1 calorie is defined as the amount of heat required to increase the temperature of 1 g of water by 1 °C. The relationship between these two units is: 1 cal = 4.2 J Both joule and calorie are very small units. On food labels, the energy content is usually expressed in kilojoules (kJ) or kilocalories (kcal). [Problem-solving strategy] When applying physics theories on real-world problems, in the calculation part, there is a very common strategy for all types of situations: 1. List all the variables 2. List the equations related to these variables 3. Solve the equations Even after you leave secondary school to enter a higher level, this strategy is still frequently used, only you change from listing variables to defining functions, and from solving numerical equations to solving differential equations. ------------------------------ Acknowledgements: Royalty Free Music from https://audiohub.com #DSE #physics #thermodynamics #物理 #熱和氣體 #熱力學