JAMB Physics 2022 Objective — Question 12
Question 12 of 41 from the Joint Admissions and Matriculation Board (JAMB) Physics 2022 Objective paper, with the correct answer and a full explanation.
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Water at 20°C mixed with water at 70°C; final temperature 40°C. Ratio of mass (hot:cold):
- A. 2:1
- B. 2:3Correct
- C. 5:2
- D. 2:7
Explanation
m_c×20=m_h×30 → m_h:m_c=2:3.
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