PH-2147
Heat transfer
Physics · Secondary 4 · Hard · Heat transfer
Two identical cups each contain 200 g of tea at 90 °C. Cup X is placed in a room at 20 °C. Cup Y is placed in a refrigerator at 5 °C. Both are left for 10 minutes. Which statement about the thermal energy lost by the tea is correct?
- Cup X loses more thermal energy because 20 °C is closer to 90 °C.
- Cup Y loses more thermal energy because the temperature difference is larger.
- Both lose the same thermal energy because they start at the same temperature.
- Neither loses thermal energy because they are in steady surroundings.
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