question_answer

Will five litres of benzene weigh more in summer or winter? Comment.

Answer:

                Weight \[=mg=\left( V\rho  \right)g\] where \[\rho \] is density. Now, V and g are constants. Therefore, weight\[\propto \rho \] In summer, temperature rises. Therefore, due to thermal expansion, density \[\rho \] decreases, and hence, the weight decreases. Thus, 5 litres of benzene will weigh more in winter than in summer.