11. If the cyclic integral of dQ/T is greater than zero then the cycle is
dQ/T>0
12. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas
13. A non-dimensional number generally associated with natural convection heat transfer is
14. Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)
