Post-UTME Physics 2015 Objective — Question 10
Question 10 of 20 from the Post-UTME Screening (Post-UTME) Physics 2015 Objective paper, with the correct answer and a full explanation.
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20g of water at 2C is added to 35g of water at 65C. Calculate the final steady temperature of the mixture.
- A. 63.9C
- B. 56.0C
- C. 42.1CCorrect
- D. 40.6C
Explanation
Heat balance: 20(Tf-2)=35(65-Tf). Solving gives Tf approximately 42.1C.
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