You come across a mysterious pond of an unknown liquid during your normal work day (lucky you). being curious, you submerge an upright large stick into the liquid. you note that 1.5 m of the stick is submerged. although you are holding the stick out 21 cm in front of you, the bottom of the stick appears 31 cm away. what is the mysterious liquid’s index of refraction?

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.