Neco 2021 Physics Question 36
Practice objective / multiple choice question 36 from the 2021 Neco Physics examination.
A metal block of unknown mass \(m\) (kg) has a specific heat capacity of \(0.9\ \text{kJ·kg}^{-1}\text{K}^{-1}\). It is heated to \(150^{\circ}\text{C}\) and then placed into a well‑insulated container holding \(0.5\ \text{kg}\) of water at \(20^{\circ}\text{C}\) (\(c_{\text{water}} = 4.18\ \text{kJ·kg}^{-1}\text{K}^{-1}\)). Before the system reaches equilibrium, \(5\%\) of the heat released by the metal is lost to the surroundings. When equilibrium is attained the temperature of the water‑metal system is \(45^{\circ}\text{C}\). Determine the mass \(m\) of the metal block (to three significant figures).
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About This Question
This is Neco 2021 Physics Question 36. It is one of the objective questions from the 2021 Neco Physics examination.
Difficulty level: Medium .
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