Air at 320 k flows in a duct. if a pitot tube was inserted, what would the temperature of the air be at the tip of the pitot tube (stagnation point) if the air speed was: a. 1 m/s b. 10 m/s c. 100 m/s d. 1000 m/s

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

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. 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?