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AP EAMCET202421 May 2024Evening ShiftPhysicsThermal Properties of MatterActual

A metal block is made from a mixture of 2.4 kg of aluminium, 1.6 kg of brass and 0.8 kg of copper. The metal block is initially at 20^ C . If the heat supplied to the metal block is 44.4 calories, find the final temperature of the block if specific heats of aluminium, brass and copper are 0.216,0.0917,0.0931 cal . kg ⁻¹ C ⁻¹ respectively.

Options

  1. A100^ C
  2. B60^ C
  3. C40^ C
  4. D80^ C

Correct answer

D. 80^ C

Step-by-step solution

aligned & Q = ( m ₁ ~s ₁+ m ₂ ~s ₂+ m ₃ ~s ₃ ) T & 44.4=(2.4 0.216+1.6 0.0917+0.8 0.0931) T & T =60 ~T -20=60 & ~T =80^ c aligned

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