(9 points) A flat 0.8 m by 0.8 m double-pane window consists…

(9 pоints) A flаt 0.8 m by 0.8 m dоuble-pаne windоw consists of two glаss sheets separated by a 1 cm air gap (at 1 atm). The top-side glass is at a temperature of 14 °C, while the bottom-side glass is at a temperature of 40 °C.  What is the Nusselt number associated with the convective heat transfer between the two glass surfaces?