Liquid water flows in thin walled copper tube with inside diameter d=15.2 cm. the mean inlet temperature of water is 82.2°c and it s velocity 7.2m/s. the outside convection coefficient is 14.1 w/m²k, and the temperature is 15.6 °c. for this system: (a) determine the heat transfer coefficient at the inner surface of the tube, and (b) find the length of the tube in which the water temperature drops by 5/9°c state and justify any assumptions you may make.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.