Air at 50 degree C and 1 atm is cooled by flowing through an underwater duct. The water is at 5 degree C. The duct is 20-cm-diameter and 12-m-long. The mean velocity of air is 7 m/s. If the average heat transfer coefficient is 85 W/m2K and the tube temperature is nearly equal to the water temperature, determine the rate of heat transfer. Air properties at the anticipated average temperature of 30 degree C are: density

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10