Ahorizontal pipe has an abrupt expansion from d1 = 8 cm to d2 = 16 cm. the water velocity in the smaller section is 10 m/s and the flow is turbulent. the pressure in the smaller section is p1 = 420 kpa. taking the kinetic energy correction factor to be 1.06 at both the inlet and the outlet, determine the downstream pressure p2, and estimate the error that would have occurred if bernoulli’s equation had been used. take the density of water to be rho = 1000 kg/m3. (round the final answers to one decimal place.)

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.