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19 Nov 2019
The forming section of a plastics plant puts out a continuous sheet of plastic that is 1.2 m wide and 2 mm thick at a rate of 18 m/min. The sheet is subjected to airflow at a velocity of 4 m/s on both top and bottom surfaces normal to the direction of motion of the sheet. The width of the air cooling section is such that a fixed point on the plastic sheet passes through that section in 2 s. Using properties of air at 1 atm and 60 °C (The density and kinematic viscosity of air at l atm and 60 °C are Ï = 1.059 kg/m3 and v= 1.896Ã10-5 m2/s), determine the drag force the air exerts on the plastic sheet in the direction of airflow Air 4 m/s Plastic sheet 18 m/min
The forming section of a plastics plant puts out a continuous sheet of plastic that is 1.2 m wide and 2 mm thick at a rate of 18 m/min. The sheet is subjected to airflow at a velocity of 4 m/s on both top and bottom surfaces normal to the direction of motion of the sheet. The width of the air cooling section is such that a fixed point on the plastic sheet passes through that section in 2 s. Using properties of air at 1 atm and 60 °C (The density and kinematic viscosity of air at l atm and 60 °C are Ï = 1.059 kg/m3 and v= 1.896Ã10-5 m2/s), determine the drag force the air exerts on the plastic sheet in the direction of airflow Air 4 m/s Plastic sheet 18 m/min
Lelia LubowitzLv2
4 Mar 2019