Determine the mean barometric reading in mmHg.

Q2: The table below represents the vertical coordinates of the hydrograph of a rainstorm over a mountainous area of 770 km2 as a result of a 6 hour rainstorm. Derive the vertical coordinates of a 6 hour standard hydrograph and then determine: 1- The value of the vertical coordinate for 6 hours of a standard hydrograph at a time of 18 hours. 2-The value of the vertical coordinate of 6 hours standard hydrograph at the time of 36 hours 3-The value of the vertical coordinate of 6 hours of st and ard hydrograph at the time of 66 hours the time 72 66 60 54 48 42 36 30 24 18 12 60 (hour) discharge 42 50 70 100 145 205 270 350 400 360 215 65 40 (m3/s) flow 42 42 42 42 41 baseband 41 41 40 40 40 40 40 40 40 (m3/s)

! Required information A manometer is used to measure the air pressure in a tank. The fluid used has a specific gravity of 1.40, and the differential height between the two arms of the manometer is 19.8 in. The local atmospheric pressure is 12.7 psia. The specific gravity of the fluid is given to be 1.40. The density of water at 32°F is 62.4 lbm/ft³. Determine the absolute pressure in the tank for the case of the manometer arm with the higher fluid level being attached to the tank. The absolute pressure in the tank is psia.