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Questions on Heat Transfer

Q1. A cup should keep a hot beverage warm for as long as possible. The diagram shows three cups designed to take on a camping trip. All three cups are the same size and the same colour and finish.

(i) Explain why when you hold a hot drink in cup A it is likely to cool down more quickly than a hot drink in cup B.

(3 marks)

(ii) Cup C is made from the same plastic as cup B. Explain why cup C is likely to keep the drink warmer for longer than cup B.

(3 marks)

(c) Walkers and campers are often advsed to take a 'survival blanket' with them. A survival blanket is made of a light, thin, shiny material.

Explain which feature of the blanket's design would enable a person to retain body heat.

(2 marks)

Maximum 7 marks