2. An automobile is travelli
the same time
Page No
Dale
A man walking on road with a
g on roza with a velocity at
5 km / hy encounters saim falling with a
Velocity
of 12 km/hr. At what angle should
he hold his umbrella in order to protect +
himselt from the rain?
Under what conditions is average veloci

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.