Four identical beakers were wrapped in different materials and filled with 200 ml of hot water at 90°C. After 20 minutes, which material would result in the water having the LOWEST temperature?
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Worked Solution
Step 1: The question asks for the lowest temperature, meaning the highest rate of heat loss.
Step [2-9]: Aluminium is a metal and a good conductor of heat.
Step [2-9]: Good conductors allow heat to pass through them quickly from the hot water to the surroundings.
Correct answer: Aluminium foil
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