Water at 28 ºC flows into a straight horizontal duct, there is no downloading of calories or work with the neighborhood. Its velocity is 8 m/s on a tube section with an internal diameter of 1.5 cm....

Water at 28 ºC flows into a straight horizontal duct, there is no downloading of calories or work with the neighborhood. Its velocity is 8 m/s on a tube section with an internal diameter of 1.5 cm. The water passes from this section to another section, where there is a sudden increase in diameter. What is the change in water temperature if the diameter of the second section is 3 cm? What if he stops 5 cm? Consider that for water cp = 4.18 kJ / kg.oC