A) \[9.2\times {{10}^{-3}}kg\]
B) \[8\times {{10}^{-3}}kg\]
C) \[6.9\times {{10}^{-3}}kg\]
D) \[5.4\times {{10}^{-3}}kg\]
Correct Answer: C
Solution :
Heat transferred in one minute is utilised in melting the ice so, \[\frac{KA({{\theta }_{1}}-{{\theta }_{2}})t}{l}=m\times L\] \[\Rightarrow m=\frac{{{10}^{-3}}\times 92\times (100-0)\times 60}{1\times 8\times {{10}^{4}}}=6.9\times {{10}^{-3}}kg\]
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