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Heat and Thermodynamics question

2025 · 23 Jan · Shift 1 · Q57
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Heat and Thermodynamics question

2025 · 23 Jan · Shift 1 · Q57

JEE MainPhysicsHeat and ThermodynamicsMCQ+4 / −1
A gun fires a lead bullet of temperature 300 K into a wooden block. The bullet having melting temperature of 600 K penetrates into the block and melts down. If the total heat required for the process is 625 J , then the mass of the bullet is ‾\underline{\hspace{2cm}}​ grams. (Latent heat of fusion of lead =2.5×104JKg−1=2.5 \times 10^4 \mathrm{JKg}^{-1}=2.5×104JKg−1 and specific heat capacity of lead =125JKg−1K−1)=125 \mathrm{JKg}^{-1}\left.\mathrm{K}^{-1}\right)=125JKg−1K−1)
  1. A
    20
  2. B
    15
  3. C
    5
  4. D
    10
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