Neco Model Questions Vol1 2020 Physics Question 31
Practice objective / multiple choice question 31 from the 2020 Neco Model Questions Vol1 Physics examination.
A metal block of unknown mass \(m\) (in kg) with specific heat capacity \(c_{m}=0.45\ \text{kJ·kg}^{-1}\text{K}^{-1}\) is heated to \(150^{\circ}\text{C}\) and then placed into an insulated container that holds \(2.0\ \text{kg}\) of water (\(c_{w}=4.18\ \text{kJ·kg}^{-1}\text{K}^{-1}\)) initially at \(25^{\circ}\text{C}\). The container also contains a metal tray of mass \(0.5\ \text{kg}\) with specific heat \(c_{t}=0.9\ \text{kJ·kg}^{-1}\text{K}^{-1}\) initially at \(25^{\circ}\text{C}\). After thermal equilibrium the final temperature of the system is \(30^{\circ}\text{C}\). Assuming no heat loss to the surroundings, determine the mass \(m\) of the metal block.
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About This Question
This is Neco Model Questions Vol1 2020 Physics Question 31. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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