A fluid with an average speed of 2.1 m/s flows through commercial steel tubing with an inside diameter of 2 mm and a length of 200 m. The tube inlet can be modeled as re-entrant. The discharge end of the tube is 60 m lower than the inlet. Calculate the pressure drop assuming the fluid is:

a) air with average properties of 100 C,200 kPa.
b) water with an average temperature of 20 C

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.

Prove the equivalence between the two statements of the 2nd law of thermodynamics (i.e., a violation of one statement leads to the violatio the other statement)