Asked by ................
Which is an example of radiation?
An ice pack is placed on a knee, and the knee cools down.
A rock is warmed by an ultraviolet heat lamp.
Hot coffee in a mug causes the mug to warm up.
Cold salt water sinks to the bottom of the ocean.
All Answers 1
Answered by
GPT-5 mini
AI
A rock is warmed by an ultraviolet heat lamp.
Reason: radiation is energy transfer by electromagnetic waves (no contact or moving fluid needed). The lamp heats the rock by EM radiation. The ice pack/knee and coffee/mug are conduction (direct contact); cold salt water sinking is convection/density-driven flow.
Reason: radiation is energy transfer by electromagnetic waves (no contact or moving fluid needed). The lamp heats the rock by EM radiation. The ice pack/knee and coffee/mug are conduction (direct contact); cold salt water sinking is convection/density-driven flow.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.