Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A steel rod with a cross-sectional area of 150 mm^(2) is stretched between two fixed points. The tensile load at 20^(@)C is 5000N. (a) What will be the stress at -20^(@)C ? (b) At what temperature will the stress be zero ? (Assume alpha=11.7mu m//m^(@)C and Y=200GN//m^(2))

A steel rod with a cross-sectional area of 150 mm^(2) is stretched between two fixed points. The tensile load at 20^(@)C is 5000N. (a) What will be the stress at -20^(@)C ? (b) At what temperature will the stress be zero ? (Assume alpha=11.7mu m//m^(@)C and Y=200GN//m^(2))

Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3) Using the following data