Let's analyze each statement regarding the transfer of thermal energy and equipment design:
A. A metal screen could be placed between the open fire and the person's hand to prevent radiation.
- False. While a metal screen can block some of the thermal radiation, it's more effective to block radiant heat with materials designed for that purpose, like reflective surfaces or specific non-metallic materials that reflect radiation.
B. The person could use insulating gloves to reduce the loss of heat from their hands due to radiation.
- False. While insulating gloves can reduce conductive and convective heat transfer, they do not significantly reduce heat loss via radiation. This is because the insulation is typically not effective against radiant heat, which can occur through air.
C. The tea kettle could have a layer of insulating water to increase radiation within the kettle as it warms.
- False. Water is not an effective insulator against radiation. It may help conduct heat but it doesn’t insulate against radiation, and layering water would not increase radiation within the kettle.
D. A fireplace poker could be made of non-metal to reduce the conduction of heat to the person holding the object.
- False. A non-metal poker may not effectively reduce conduction as some non-metals can also be good conductors depending on their material properties; common materials like wood, however, will not transfer heat as effectively as metal.
E. The kettle could be designed with a wooden handle rather than a metal one to reduce conduction of heat to a person's hand.
- True. A wooden handle is a good insulator and would indeed reduce the conduction of heat to the person holding the kettle compared to a metal handle, which would conduct heat more effectively.
In summary, the only true statement regarding the transfer of thermal energy in equipment design among the options provided is:
E. The kettle could be designed with a wooden handle rather than a metal one to reduce conduction of heat to a person's hand.
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