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

  • A

    $\frac{{{c_1}{T_1} + {c_2}{T_2} + {c_3}{T_3}}}{{{m_1}{c_1} + {m_2}{c_2} + {m_3}{c_3}}}$

  • B

    $\frac{{{m_1}{c_1}{T_1} + {m_2}{c_2}{T_2} + {m_3}{c_3}{T_3}}}{{{m_1}{c_1} + {m_2}{c_2} + {m_3}{c_3}}}$

  • C

    $\frac{{{m_1}{c_1}{T_1} + {m_2}{c_2}{T_2} + {m_3}{c_3}{T_3}}}{{{m_1}{T_1} + {m_2}{T_2} + {m_3}{T_3}}}$

  • D

    $\frac{{{m_1}{T_1} + {m_2}{T_2} + {m_3}{T_3}}}{{{c_1}{T_1} + {c_2}{T_2} + {c_3}{T_3}}}$

Similar Questions

A 'thermacole' icebox is a cheap and an efficient method for storing small quantities of cooked food in summer in particular. A cubical icebox of side $30 \,cm$ has a thickness of $5.0\; cm .$ If $4.0\; kg$ of ice is put in the box, estimate the amount of ice (in $kg$) remaining after $6 \;h$. The outside temperature is $45\,^{\circ} C ,$ and co-efficient of thermal conductivity of thermacole is $0.01\; J s ^{-1} m ^{-1} K ^{-1} .$ Heat of fuston of water $=335 \times 10^{3}\;J kg ^{-1} $

A block of ice with mass $m$ falls into a lake. After impact, a mass of ice $m/5$ melts. Both the block of ice and the lake have a temperature of $^o C$. If $L$ represents the heat of fusion, the minimum distance the ice fell before striking the surface is

$300\, gm$ of water at $25°C$ is added to $100\, gm$ of ice at $0°C$. The final temperature of the mixture is........ $^oC$

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 $=0^{\circ} C$ )

The temperature of equal masses of three different liquids $A, B$ and $C$ are $12°C, 19°C$ and $28°C$ respectively. The temperature when $A$ and $B$ are mixed is $16°C$ and when $B$ and $C$ are mixed is $23°C$. The temperature when $A$ and $C$ are mixed is........ $^oC$