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QLDPhysicsQuick questions
Unit 1: Thermal, nuclear and electrical physics
Quick questions on Heat transfer: conduction, convection and radiation (QCE Physics Unit 1)
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is calling convection "heat rising"?Show answer
Heat is not a thing that rises. Hot fluid rises because it is less dense. Convection is the resulting current.
What is saying radiation needs a medium?Show answer
Radiation passes through vacuum (this is how the Sun warms the Earth).
What is confusing absorption with emission?Show answer
Good absorbers are good emitters (Kirchhoff's radiation law). Matte black is both. Shiny silver is neither.
What is treating the wind as conduction?Show answer
Wind cooling a person is forced convection, not conduction.
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