Hot oil (cp = 2200 j/kg·k) is to be cooled by water (cp = 4180 j/kg·k) in a 2-shell-passes and 12-tube-passes heat exchanger. the tubes are thin-walled and are made of copper with a diameter of 1.8 cm. the length of each tube pass in the heat exchanger is 3 m, and the overall heat transfer coefficient is 340 w/m2 ·k. water flows through the tubes at a total rate of 0.1 kg/s, and the oil flows through the shell at a rate of 0.2 kg/s. the water and the oil enter at temperatures 18°c and 160°c, respectively. determine the rate of heat transfer in the heat exchanger and the outlet temperatures of the water and the oil. answers: 36.2 kw, 104.6°c, 77.7°c

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

What occurs during a combustion reaction