Oil, with p=900 kg/m^3 and v=0.1 m^2/s, flows at 0.2 m^3/s, through a tube 200 mm diameter and 500 m length. determine: (i) the head loss (ii) the pressure drop if the pipe slopes down at 100 in the flow direction.

Fluids at rest possess no flow energy. a)- true b)- false

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Determine the stoichiometric and actual air-fuel ratios and the mole flue gas composition for combustion with 15% excess air for raw indiana, pennsylvania raw coal.