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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

Equal masses of A,B,C start at 10°C,30°C,50°C. A+B equilibrates at 22°C; B+C at 38°C. Neglect losses and assume constant c. What is A+C equilibrium temperature?

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Answer:

Solution:

From $A + B : 12 c_{A} = 8 c_{B}$ , so $cA : cB = 2 : 3$ . From $B + C : 8 c_{B} = 12 c_{C}$ , so $cB : cC = 3 : 2$ . Thus $cA = cC$ and $A + C$ gives $(10 + 50) /2 = 3 0^{\circ} C$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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