waec model questions vol1 2019 physics
Objective • Question 4
Question 4
WAEC_MODEL_QUESTIONS_VOL1
•
2019
200 g of water at 80 °C is mixed with 300 g of water at 20 °C in an insulated container. A metal rod of mass 150 g and specific heat capacity 0.45 J g⁻¹ °C⁻¹, initially at 150 °C, is then immersed in the mixture. Assuming no heat loss to the surroundings, calculate the final equilibrium temperature of the system (in °C, to one decimal place).
Answer Options
Correct Answer
A.
47.3 °C
B.
42.8 °C
C.
45.1 °C
D.
50.2 °C
Correct Answer
A
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