Water at 20°c is flowing uniformly in a wide rectangular channel at an average velocity of 1.3 m/s. if the water depth is 0.16 m, determine whether the flow is laminar or turbulent and whether the flow is subcritical or supercritical. the density and dynamic viscosity of water at 20ºc are rho = 998.0 kg/m3 and μ = 1.002 × 10–3 kg/m·s.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling