Question

A brass rod is 40.1 cm long and an aluminum rod is 79.3 cm longwhen both rods are at an initial temperature of 0 degrees celsius.The rods are placed in line with a gap of 0.6 cm between them. Thedistance between the far ends of the rods is maintained at 120.0 cmthroughout. The temperature is raised until the two rods are barelyin contact. The coefficients of linear expansion of brass andaluminum are 2.0 x 10-5 K-1 and 2.4 x 10-5 K-1, respectively. InFig. 17.1a, the temperature at which contact of the rods barelyoccurs, in degrees celsius, is closest to:

a)200

b)244

c)233

d)222

e)211