Question
Question: Two bodies of specific heats S<sub>1</sub> and S<sub>2</sub> having same heat capacities are combine...
Two bodies of specific heats S1 and S2 having same heat capacities are combined to form a single composite body. Specific heat of composite body is –
A
S1 + S2
B
2S1+S2
C
S1+S22S1S2
D
S11 + S21
Answer
S1+S22S1S2
Explanation
Solution
m1 s1 = m2 s2 …...(1)
m1 s1 + m2 s2 = (m1 + m2) s ….(2)
s = m1+m2m1s1+m2s2 = m1+m22m1s1 (\ m1s1 = m2s2 )
= m1+s2m1s12m1s1 = s1+s22s1s2