Question

A metal beam is 5 m long at a temperature of 20 degrees * C . On a hot day, the temperature rises to 40 degrees * C What is the change in the length(in cm) of the beam due to thermal expansion? (Take a mebx =1.6*10^ -5 C^ -1 ) (A) 18 cm (B) 13 cm (C) 21 cm (D) 0.16 cm​

Answer 1

Answer:

B is the correct answer

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