Question 1 of 10

1. This question refers to the passage and the diagram.

When two substances come into direct contact, heat flows from the warmer substance to the cooler substance through the process of conduction. Heat is transferred throughout a liquid by the process of convection. Warmer liquid rises and cooler liquid sinks to replace it. Convection transfers heat from warmer regions to cooler regions through the physical movement of the liquid. Heat waves, or infrared radiation, are a form of invisible electromagnetic radiation similar to light. Hot objects tend to emit infrared radiation, heat, while cold objects tend to absorb it. Like light, heat waves can travel through a vacuum and be reflected.


A vacuum container is designed to keep cold liquids cold and hot liquids hot. How do the components of a vacuum container reduce the transfer of heat from a hot liquid in the container to the surrounding environment?
1. The partial vacuum limits the radiation of heat and the silvered walls reduce the conduction of heat.
2. The partial vacuum limits the conduction of heat and the silvered walls reduce the radiation of heat.
3. The partial vacuum limits the radiation of heat and the silvered walls reduce the convection of heat.
4. The partial vacuum limits the convection of heat and the ilvered walls reduce the reflection of heat.
5. The partial vacuum limits the convection of heat and the silvered walls reduce the conduction of heat.

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