The spectral transmissivity of plain and tinted glass can be approximated as: Plain glass: τA = 0.9 0.3 μm < λ < 2.5 um
Tinted glass: τA = 0.9 0.5 μm < λ < 1.5 um

Outside the noted ranges, the transmissivity is zero for both glasses. Compare the solar heat flux transmitted through both glasses, assumingsolar irradiation as black body emission at 5800 K.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.