The atomic heat capacities of all solid elements ________ with decrease in temperature?

Principal alloying element in Elinvar (used for making hair springs for watches) is________?

Dimension of mass diffusivity is the same as that of________?

Gas holder of a gobar (cow-dung) gas plant is made of________?

Steel & cast iron pipes are produced by ________ casting?

Kopp’s rule is used to calculate the heat capacity of________?