Three liquids with masses ${m_1},\,{m_2},\,{m_3}$ are thoroughly mixed. If their specific heats are ${c_1},\,{c_2},\,{c_3}$ and their temperatures ${T_1},\,{T_2},\,{T_3}$ respectively, then the temperature of the mixture is
$\frac{{{c_1}{T_1} + {c_2}{T_2} + {c_3}{T_3}}}{{{m_1}{c_1} + {m_2}{c_2} + {m_3}{c_3}}}$
$\frac{{{m_1}{c_1}{T_1} + {m_2}{c_2}{T_2} + {m_3}{c_3}{T_3}}}{{{m_1}{c_1} + {m_2}{c_2} + {m_3}{c_3}}}$
$\frac{{{m_1}{c_1}{T_1} + {m_2}{c_2}{T_2} + {m_3}{c_3}{T_3}}}{{{m_1}{T_1} + {m_2}{T_2} + {m_3}{T_3}}}$
$\frac{{{m_1}{T_1} + {m_2}{T_2} + {m_3}{T_3}}}{{{c_1}{T_1} + {c_2}{T_2} + {c_3}{T_3}}}$
$200 \,g$ of ice at $-20^{\circ} C$ is mixed with $500 \,g$ of water at $20^{\circ} C$ in an insulating vessel. Final mass of water in vessel is ........... $g$ (specific heat of ice $=0.5 \,cal g ^{-10} C ^{-1}$ )
$5\, g$ of ice at $0°C$ is dropped in a beaker containing $20\, g$ of water at $40°C.$ The final temperature will be........ $^oC$
Two liquids $A$ and $B$ are at $32\,^oC$ and $24\,^oC.$ When mixed in equal masses the temperature of the mixture is found to be $28\,^oC$. Their specific heats are in the ratio of
A bullet of mass $10 \,g$ moving with a speed of $20 \,m / s$ hits an ice block of mass $990 \,g$ kept on a frictionless floor and gets stuck in it. How much ice will melt if $50 \%$ of the lost KE goes to ice is .......... $g$ (initial temperature of the ice block and bullet $=0^{\circ} C$ )
$1\,\, kg$ of ice at $-10^o C$ is mixed with $4.4\,\, kg$ of water at $30^o C$. The final temperature of mixture is ........$^oC$ (specific heat of ice is $2100\,\,J/kg/k$)