Water enters a hydraulic turbine through a 30-cm-diameter pipe at a rate of 1.1 m3/s and exits through a 25-cm-diameter pipe. the pressure drop in the turbine is measured by a mercury manometer to be 1.2 m. for a combined turbine–generator efficiency of 83 percent, determine the net electric power output. disregard the effect of the kinetic energy correction factors. take the density of water to be 1000 kg/m3 and the density of mercury to be 13,560 kg/m3. the net electric power output is kw.

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation