What will be the stress at `-20^(@)`C, if 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 5000 N (Assume, `alpha=11.7xx10^(-6)//^(@)C` and Y = `200 xx 10^(11)`N//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) )

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 wire of cross sectional area 3 mm^(2) is just stretched between two fixed points at a temperature of 20^(@)C . Then the tension in the wire when the temperature falls to 10^(@)C is, (alpha =1.2 xx 10^(-5) //""^(@)C, Y=2xx10^(11) N//m^(2))

A wire of cross sectional area 3mm^(2) is just stretched between two fixed points at a temperature of 20^(@) . Determine the tension when the temperature falls to 20^(@) C . Coefficient of linear of expansion alpha = 10^(-5)//"^(@)C and Y = 2 xx 10^(11)N//m^(2) .

A wire of cross-sectional area 3 mm^(2) is first stretched between two fixed points at a temperature of 20^(@)C . Determine the tension when the temperature falls to 10^(@)C Coefficient of linear expansion alpha=10^(-5).^(@)C^(-1) and Y =2 xx10^(11) N//m^(2)

A steel rod of length 50 cm has a cross–sectional area of 0.4 cm^(2) . What force would be required to stretch this rod by the same amount as the expansion produced by heating it through 10^(@)C . ( alpha = 10^(-5) k^(-1) and Y = 2 xx 10^(11) N//m^(2))

A steel rod of length 25cm has a cross-sectional area of 0.8cm^(2) . The force required to stretch this rod by the same amount as the expansion produced by heating it through 10^(@)C is (alpha_(steel)=10^(-5)//^(@)C and Y_(steel)=2xx10^(10)N//m^(2))

A steel rod of length 25cm has a cross-sectional area of 0.8cm^(2) . The force required to stretch this rod by the same amount as the expansion produced by heating it through 10^(@)C is (alpha_(steel)=10^(-5)//^(@)C and Y_(steel)=2xx10^(10)N//m^(2))