Air at 1 atm. and 300 k blows across a 100 cm square plate at 30 m/s. heating does not begin until x-50 cm after which the plate surface temperature is maintained at 400k: a) draw the schematic of the system. b) calculate the heat transfer lost by the plate.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.