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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionHard2 minQB

PhysicsHardmultiple choice

Two isolated, nonreacting samples at distinct initial temperatures have positive constant heat capacities C1,C2. There is no phase change or external work. Choose correct statements.

Options:(select one or more)

Answer:

A, B, D

Solution:

$T_{f} = \frac{( C _{1} T _{1} + C _{2} T _{2} )}{( C _{1} + C _{2} )}$ . Positive weights give a strict interior value. Equating to (T1+T2)/2 yields $(C_{1} - C_{2}) (T_{1} - T_{2}) = 0$ ; since temperatures differ, C1=C2. A common factor cancels. A,B,D.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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