A working fluid enters a steady flow system with a velocity of 30m/s and leaves at 140m/s. The mass flow rate is 9 kg/s. The properties of the fluid entry are 13.8 bar,

0.122 m3

/kg, and internal energy 42.2 kJ/kg, and exit properties are 1.035 bar, 0.805

m3

/kg and internal energy 208 kJ/kg. Determine the work transfer in kW from the

system

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.