An experimental model of heat transfer from flow through a pipe is to use the same working fluid as the full$-$scale situation. In such a case, the Nusselt number $($hd$/$k$,$ where h is the heat transfer coeffcient, d is the pipe diameter and k is a fluid property$)$ is a function of the Reynolds number. What would you expect to be the ratio of the full$-$scale heat transfer coefficient to that measured in the model when the flow velocity in the model is $0\mathrm{.}75$ times that of the full$-$scale situation. Answer to two decimal places.