Consider a flat plate with the surf-ace heat flux specified as ,, l2O W/m2 when 0 { x { 15 cm, 4,, : ll0 W/m2 when x ) 15 cm. Air at atmospheric pressure and 20"C flows over this plate at 3 m/s. Estimate the variation of wall temperature with the distance x fiom the leading edge in the laminar boundary layer region, and evaluate the wall temperature numerically at 30 cm.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

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.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2