Internal energy is independent of the ________ for an ideal gas?

The Fourier number (defined as a.t/L2) is used in the analysis of problem involving heat transfer by________?

Inorganic impurities causing water pollution is ________?

Pick out the correct statement?

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

________ of depreciation calculation does not take into account the interest on investments?