A) \[4.234kg\]
B) \[1.734kg\]
C) \[3.687kg\]
D)
\[0.456kg\]
Correct Answer: C
Solution :
Given, each side of cubical ice box [a] = 30 cm area of 6 faces of box =\[6\times (30\times 30)c{{m}^{2}}\] A = 5400 \[\times \]\[{{10}^{-4}}{{m}^{2}}\] thickness of the box =\[~5.0cm=5.0\times {{10}^{-2}}cm\] |
Mass of ice (m) \[=4.0kg\] |
Time (t) =6h=\[6\times 60\times 60s\] |
Difference in temperature \[\left( \Delta \theta \right)={{\theta }_{1}}-{{\theta }_{2}}\]\[=45{}^\circ -0=45{}^\circ C\] |
Latent heat of fusion of water (L) \[=335\times {{10}^{3}}j/kg\] |