Along, thin flat plate is placed parallel to a 20 ft/s stream of water at 68°f. at what distance x from the leading edge will the boundary layer thickness be 1 in? (for water at 68°f, v = 1.082 x 10^-5.ft^2).

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.

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false