Air is heated by a hair dryer along a convergent duct. The diameter of outlet is 75% of the inlet. The density change from the inlet to the outlet is 1.225 and 1.005 respectively. Determine the percent increase in the velocity of air as it flows through the hair dryer.

Pump Horsepower in Brine System. A pump pumps 0.200 ft3/s of brine solution having a density of 1.15 g/cm3 from an open feed tank having a large cross-sectional area. The suction line has an inside diameter of 3.548 in. and the discharge line from the pump a diameter of 2.067 in. The discharge flow goes to an open overhead tank, and the open end of this line is 75 ft above the liquid level in the feed tank. If the friction losses in the piping system are 18.0 ft lbf/lb m, what pressure must the pump develop and what is the horsepower of the pump if the efficiency is 70%? The flow is turbulent.

NEED IMMEDIATELY. 1)Determine the mass flow rate in lbm/s of a liquid (ρ = 0.8 g/cm3) flowing through a 2 in (inside diameter) pipe at 480 m/min.          A horizontal pipe of cross section 1.5 in2 has a constriction of cross section of 2 cm2. Gasoline flows in the larger pipe with a speed of 500 m/hr. Find the speed in the constriction in ft/min.     SHOW COMPLETE SOLUTION and conversion

Choose the correct answer of the following questions 2. A siphon used to empty a tank consists essentially of a pipe with its summit 0.5 m above the water surface of the tank and its outlet at 2.0 m below the summit. Neglecting friction and other losses. the velocity in the siphon is: a. 4.4 m/sec b. 5.4 m/sec C.3.1 m/sec d. 3.8 m/sec 3. A 20 cm diameter open cylindrical container contains Kerosene (relative density = 0.80) to a height of 20 cm. It is rotated about a vertical axis coinciding with the axis of the cylinder. If the bottom of the cylinder at the axis is just exposed, the speed of rotation is: a. 94.6 rpm br267.5 rpm c. 133.8 rpm d. 535.0 rpm