Neco 2025 Physics Question 30
Practice objective / multiple choice question 30 from the 2025 Neco Physics examination.
A \(150\ \text{g}\) piece of copper (specific heat \(c_{\text{Cu}} = 0.385\ \text{J g}^{-1}\!^{\circ}\text{C}^{-1}\)) at \(120^{\circ}\text{C}\) is placed into \(200\ \text{g}\) of water (specific heat \(c_{\text{w}} = 4.18\ \text{J g}^{-1}\!^{\circ}\text{C}^{-1}\)) initially at \(25^{\circ}\text{C}\) in an insulated container. The container, however, loses heat to the surroundings at a constant rate of \(5.0\ \text{J s}^{-1}\) for the duration of the mixing, which lasts \(2.0\ \text{min}\). Assuming no phase change, calculate the final equilibrium temperature of the system in degrees Celsius, correct to one decimal place.
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About This Question
This is Neco 2025 Physics Question 30. It is one of the objective questions from the 2025 Neco Physics examination.
Difficulty level: Medium .
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