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b A large steel wheel is to be fitted on to a shaft of the same material. At 27theouter diameter of the shaft is 8.70 cm and the diameter of the central hole in thewheel is 8.69 cm. The shaft is cooled using 'dry ice. At what temperature of theshaft does the wheel slip on the shaft? Assume coefficient of linear expansion ofthe steel to be constant over the required temperature range:asteel=1.20 × 10-s K-1.

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