on a day when the temperature is . ° C ? Coefficient of linear expansion of steel = . × – K – .
. A large steel wheel is to be fitted on to a shaft of the same material. At ° C, the outer diameter of the shaft is . cm and the diameter of the central hole in the wheel is .
cm. The shaft is cooled using ‘dry ice’. At what temperature of the shaft does the wheel slip on the shaft? Assume coefficient of linear expansion of the steel to be constant over the required temperature range : α steel = .
× – K – . . A hole is drilled in a copper sheet. The diameter of the hole is .
cm at . ° C. What is the change in the diameter of the hole when the sheet is heated to ° C? Coefficient of linear expansion of copper = .
× – K – . . A brass wire . m long at ° C is held taut with little tension between two rigid supports.
If the wire is cooled to a temperature of – ° C, what is the tension developed in the wire, if its diameter is . mm ? Co-efficient of linear expansion of brass = . × – K – ; Young’s modulus of brass = .
× Pa. . A brass rod of length cm and diameter . mm is joined to a steel rod of the same length and diameter.
What is the change in length of the combined rod at ° C, if the original lengths are at . ° C? Is there a ‘thermal stress’ developed at the junction ? The ends of the rod are free to expand (Co-efficient of linear expansion of brass = .
× – K – , steel = . × – K – ). . The coefficient of volume expansion of glycerine is × – K – .
What is the fractional