23. A copper and a iron rod of equal length and equal area of cross section are covered with wax coatings of equal thickness . Now one end each of rods is put in same high temperature in oven. Wax coatings melt up to lengths 15 cm and 6 cm respectively in the two rods.If the coefficient of thermal conductivity of copper is 0.9 CGS unit , find that of iron.

23. A copper and a iron rod of equal length and equal area of cross se

1.	23. A copper and a iron rod of equal length and equal area of cross section are covered with wax coatings of equal thickness . Now one end each of rods is put in same high temperature in oven. Wax coatings melt up to lengths 15 cm and 6 cm respectively in the two rods.If the coefficient of thermal conductivity of copper is 0.9 CGS unit , find that of iron.
Answer» 23. A copper and a iron rod of equal length and equal area of cross section are covered with wax coatings of equal thickness . Now one end each of rods is put in same high temperature in oven. Wax coatings melt up to lengths 15 cm and 6 cm respectively in the two rods.If the coefficient of thermal conductivity of copper is 0.9 CGS unit , find that of iron.