The cylindrical stack (chimney) of an incinerator must be designed so that the ash particles produced upon combustion settle. Stack gases of density 0.5 kg/m3, h = 5 x 10-5 Pa*s rise through a stack 1 m in diameter. If the ash particles are 5 mm spheres with
density 2000 kg/m3, what is the maximum possible upward mass flow rate of the gases such that the particles don't rise?
What is Rep? Assume the particles are isolated.

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

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

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