Heat and Thermal ExpansionHard
Question
Two fine steel wires fastened between the projections of a heavy brass bar,are just taut when the whole system is at 0oC. What is the tensile stress in the steel wires the temperature of the system is raised by 200oC ?
(αbrass = 2 × 10-5 oC-1, αsteel = 1.2 × 10-5 oC-1, Ysteel = 200 GNm-2)
(αbrass = 2 × 10-5 oC-1, αsteel = 1.2 × 10-5 oC-1, Ysteel = 200 GNm-2)
Options
A.3.2 Nm-2
B.3.2 × 108 Nm-2
C.32 × 108 Nm-2
D.0.48 Nm-2
Solution
Tensile Stress
= (Ysteel)
= YS (αb - αs) ᐃT
= 200 × 109 (0.8 × 10-5) (200) = 3.2 × 10 Nm-2.
= 0.32 GNm-2.
= (Ysteel)
= YS (αb - αs) ᐃT= 200 × 109 (0.8 × 10-5) (200) = 3.2 × 10 Nm-2.
= 0.32 GNm-2.
Create a free account to view solution
View Solution FreeMore Heat and Thermal Expansion Questions
Three rods of equal length joined to from to from an equilateral triangle ABC. D is the midpoint of AB. The coefficient,...5g of steam at 100oC is mixed at 100oC is mixed with 10g of ice at 0oC. Chose correct alternative/s) :- (Given swater = ...The graph AB shown in figure is a plot of temperature of a body in degree Celsius and degree Fahrenheit. The :-...The temperature of an isotropic cubical solid of length l0 density ρo and coefficient of liner expansion is increas...Three identical rods AB, CD and PQ are joined as shown. P and Q are mid points of AB and CD respectively . Ends A, B, C ...