Question

1 .A compound strip of Brass and Iron ,10cm at 20°c is held horizontally with the iron uppermost when heated from below with a bunsen burner, The Temperature of the brass is 820°c and of iron 770°c .
Calculate the difference in length of the iron and brass (linear expansivity of brass is 0.000019K and Iron is 0.000012K .


2. The difference in length between a brass and an iron rod is 20m at 15°c . What must be the length of the brass for the difference to remain at 2cm when both rods are heated at 95°c ( linear expansivity of brass = 0.0000019 per °c , of iron = 0.000017 per °c ).

Answer 1

1 .A compound strip of Brass and Iron ,10cm at 20°c is held horizontally with the iron uppermost when heated from below with a bunsen burner, The Temperature of the brass is 820°c and of iron 770°c .

Calculate the difference in length of the iron and brass (linear expansivity of brass is 0.000019K and Iron is 0.000012K .

2. The difference in length between a brass and an iron rod is 20m at 15°c . What must be the length of the brass for the difference to remain at 2cm when both rods are heated at 95°c ( linear expansivity of brass = 0.0000019 per °c , of iron = 0.000017 per °c ).