Let's analyze each statement in relation to thermal energy transfer methods: conduction, convection, and radiation.
A. A metal screen could be placed between the open fire and the person's hand to prevent radiation.
- False. Metal screens are effective at blocking radiation, but they would primarily reflect and shield against radiant heat rather than completely prevent it. Some radiation may still be absorbed or pass through.
B. The person could use insulating gloves to reduce the loss of heat from their hands due to radiation.
- False. Insulating gloves are effective primarily against conduction and convection. While they may provide some minimal insulation against radiative heat, their main purpose is to prevent heat loss through direct contact (conduction).
C. The tea kettle could have a layer of insulating water to increase radiation within the kettle as it warms.
- False. Water would not increase radiation; in fact, water is not an effective emitter of thermal radiation. It would likely serve more to transfer heat through conduction and convection rather than enhancing radiation.
D. A fireplace poker could be made of non-metal to reduce the conduction of heat to the person holding the object.
- True. Making the poker from a non-metal, such as wood or plastic, would reduce the conduction of heat, as non-metals typically conduct heat less effectively than metals.
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 poor conductor of heat compared to metal. This design would indeed help reduce heat transfer through conduction to the person’s hand.
Based on this analysis, the true statements are:
- D and E.
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