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Basics of Heat transfer Video Lecture | Crash Course: Mechanical Engineering (ME)
FAQs on Basics of Heat transfer Video Lecture - Crash Course: Mechanical Engineering (ME)
| 1. What are the three modes of heat transfer? |  |
Ans. The three modes of heat transfer are conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between two objects or substances. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves.
| 2. How does conduction transfer heat? | |
Ans. Conduction transfers heat through direct contact between two objects or substances. When there is a temperature difference between the two objects, heat energy transfers from the object with higher temperature to the object with lower temperature. This transfer occurs due to the collisions between the atoms or molecules in the objects.
| 3. What is the difference between conduction and convection? | |
Ans. The main difference between conduction and convection is the mechanism of heat transfer. Conduction transfers heat through direct contact, while convection transfers heat through the movement of fluids or gases. In conduction, heat is transferred from molecule to molecule, while in convection, heat is transferred through the movement of the fluid or gas itself.
| 4. How does radiation transfer heat? | |
Ans. Radiation transfers heat through electromagnetic waves. Unlike conduction and convection, radiation does not require a medium to transfer heat. Heat energy is emitted in the form of electromagnetic waves, such as infrared radiation, and can travel through vacuum or transparent mediums. When these waves come into contact with an object, they are absorbed, causing the object to heat up.
| 5. What are some practical applications of heat transfer? | |
Ans. Heat transfer has various practical applications in daily life. Some examples include cooking food on a stove (conduction), cooling a room with an air conditioner (convection), and feeling the warmth of the sun (radiation). Heat transfer is also crucial in industries such as power generation, refrigeration, and heating systems.
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