Problem 11.2. A steel rod has a length of exactly 0.2cm at 30°C. What will be Its length at 60°C? Heat problem 2. Sindh Textbook Board (stb) problems. Class 12 chapter heat problems sindh textbook board.

Problem 11.2. A steel rod has a length of exactly 0.2cm at 30°C. What will be Its length at 60°C?

A steel rod has a length of exactly 0.2cm at 30 °C what will be Its length at 60°C? 

Data.                                 Solutions 

L1 = 0.2cm.                  ΔT =60 - 30 =30°c 30k

T1 =30°c.                      L2= L1{1+ α Δ T}

T2= 60°c.                     L2 =0.2{1+11×10-⁶ ×30}

α = 11 X 10-⁶ k-¹          L2 =0.2 {1+0.00033}

L2= ?                             L2 =0.2 ×1.00033

Answer is L2 =0.200066cm