The prandtl number, npr, is a dimensionless group important in heat transfer calculations. it is defined as cμ/k, where c is the heat capacity of a fluid, μ is the fluid viscosity, and k is the thermal conductivity. for a particular fluid, c=0 583 j/(g c), k =0 286 w/(m c), and μ = 1936 lb /(ft h). estimate the value of without using a calculator (remember, it is dimensionless), showing your calculations; then determine it with a calculator.