Solid A, with mass 0.5M ia at its melting point TA. It is placed in thermal cont

Question

Solid A, with mass 0.5M ia at its melting point TA. It is placed in thermal contact with solid B with mass M, with heat capacity CB and initially at temperature TB (TB > TA). The combination is thermally isolated. A has latent heat of fusion L and when it has melted has heat capacity CA. If A completely melts the final temperature of both A and B is: (CATA + CBTB - 0.5ML)/(CA + CB) (CATA - CBTAB + L)/(CA + CB) 90.5 CATA + CBTB - 0.5L)/(0.5CA + Ca) (CATA + CBTB + 0.5 ML)/(CA + CB) (0.5CATA + CBTB - 0.5l)/(0.5CA - CB) Inside a room at a uniform comfortable temperature, metallic objects generally feel cooler to the touch than objects do. This is because: a given mass of wood contains more heat than the same mass of mental heat tends to flow from metal to wood the equilibrium temperature of metal in the room is lower than wood the human body begin organic, resembles wood more closely than it metal metal conducts heat better than wood

Explanation / Answer

13) e

Q = 0

0.5MCa(Ta - T) + 0.5ML + MCb(Tb - T) = 0

T(0.5MCa + MCb) = [-0.5ML + 0.5MCaTa + MCbTb]

T =  [-0.5L + 0.5CaTa + CbTb]/[(0.5Ca + Cb)]

hence,

12) b

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