Neco 2025 Physics Question 50
Practice objective / multiple choice question 50 from the 2025 Neco Physics examination.
A \(150\ \text{g}\) iron block (specific heat \(c_{\text{Fe}} = 0.45\ \text{J\,g}^{-1}\!\,^{\circ}\text{C}^{-1}\)) initially at \(200^{\circ}\text{C}\) is placed into \(250\ \text{g}\) of water (specific heat \(c_{\text{w}} = 4.18\ \text{J\,g}^{-1}\!\,^{\circ}\text{C}^{-1}\)) at \(25^{\circ}\text{C}\) inside an insulated container. However, 5 % of the heat lost by the iron is transferred to the container walls and does not heat the water. Determine the final equilibrium temperature of the water (in \(^{\circ}\text{C}\), to one decimal place).
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About This Question
This is Neco 2025 Physics Question 50. It is one of the objective questions from the 2025 Neco Physics examination.
Difficulty level: Medium .
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