1. A iron tyre of diameter 50cm at 15 celcius is to be shrunk on to a wheel of diameter 50.35cm. to what temperature must the tyre be heated so that it will slip over the wheel with a readial gap of o.5mm? (Linear expansivity of iron is 0.000012/k)
2. The difference in length between a brass and an iron rod is 14cm at 10 celcius what must be the length of the iron for this difference to remain at 14 cm when both rods are heated at 100 celcius? (linear expansivity of brass = 0.000019/k, Linear expansivity of iron= 0.000012/k )
