A) 6
B) 3
C) \[6\times {{10}^{-3}}\]
D) \[3\times {{10}^{-3}}\]
Correct Answer: D
Solution :
Kinetic energy of bullet \[=\frac{1}{2}m{{v}^{2}}\] \[=\frac{1}{2}\times 10\times {{10}^{-3}}\times 20\times 20\] \[=2J=\frac{2}{4.2}\,cal\] Heat gained by ice to melt \[=\frac{2}{4.2}\times \frac{50}{100}\] or \[mL=\frac{1}{4.2}\] or \[m=\frac{1}{4.2\times 80}g\] \[=0.002976\,g\] \[=0.002976\,g\]You need to login to perform this action.
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