Heat Transfer
Also known as: heat, Q
The spontaneous flow of thermal energy from a hotter object to a cooler one until they reach the same temperature. Fundamental to understanding how engines, climate systems, and cooking all work.
💡 Intuition
Heat always flows from hot to cold on its own — reversing this requires external work.
Core Idea
Heat is energy in transit between objects — it flows, it is not stored in an object.
🔬 Example
🎯 Why It Matters
Fundamental to understanding how engines, climate systems, and cooking all work.
⚠️ Common Confusion
Objects don't 'have' heat—they have thermal energy. Heat is the transfer.
Related Concepts
Prerequisites
Next Steps
How Heat Transfer Connects to Other Ideas
To understand heat transfer, you should first be comfortable with thermal energy. Once you have a solid grasp of heat transfer, you can move on to conduction, convection and radiation.
Go Deeper
Frequently Asked Questions
What is Heat Transfer in Physics?
The spontaneous flow of thermal energy from a hotter object to a cooler one until they reach the same temperature.
Why is Heat Transfer important?
Fundamental to understanding how engines, climate systems, and cooking all work.
What do students usually get wrong about Heat Transfer?
Objects don't 'have' heat—they have thermal energy. Heat is the transfer.
What should I learn before Heat Transfer?
Before studying Heat Transfer, you should understand: thermal energy.
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