Consider a object of characteristic length of 0.01 m and a situation for which the temperature difference is 30°C. Evaluate the thermophysical properties at the given conditions and determine the...

Consider a object of characteristic length of 0.01 m and a situation for which the temperature difference is 30°C. Evaluate the thermophysical properties at the given conditions and determine the Rayleigh number for the following fluids : (i) air at 1 atm and 400 K, (ii) helium at 1 atm and 400 K, and (iii) water at 310 K.