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(b) Hairdryer is an electromechanical device that blows ambient or hot air over damp hair to speed the evaporation of wa
Posted: Fri Jul 01, 2022 6:57 am
by answerhappygod
- B Hairdryer Is An Electromechanical Device That Blows Ambient Or Hot Air Over Damp Hair To Speed The Evaporation Of Wa 1 (32.7 KiB) Viewed 20 times
(b) Hairdryer is an electromechanical device that blows ambient or hot air over damp hair to speed the evaporation of water to dry the hair. To design a hairdryer, it should contain the following basic components: a duct of constant diameter with a few layers of electric coils, a small fan to pull the air in and force it through the heating coils. If the density of air is 1.18 kg/m³ at the inlet and 0.90 kg/m³ at the exit, calculate the percent increase in the velocity of air as it flows through the dryer. [C4, SP2][4 marks]