In the Ingen hauz's method to compare the thermal conductivities of different substances, the length upto which wax melted in copper and zinc rods are 9.3 cm and 5 cm respectively. Compare their thermal conductivities.

In the Ingen hauz's method to compare the thermal conductivities of di

1.	In the Ingen hauz's method to compare the thermal conductivities of different substances, the length upto which wax melted in copper and zinc rods are 9.3 cm and 5 cm respectively. Compare their thermal conductivities.
Answer» Solution :Given `l_(C)=9.3cmandl_(Z)=5cm` `becauseK_(C)/K_(Z)=l_(C)^(2)/l_(Z)^(2)=((9.3cm)/(5cm))^(2)=3.46` THUS, the THERMAL conductivity of COPPER is 3.46 TIMES that of zinc.