The turbine shown in fig. p5.114 develops 100 hp when the flowrate of water is 20 ft3 /s. if all losses are negligible, determine (a) the elevation h, (b) the pressure difference across the turbine, and (c) the flowrate expected if the turbine were removed. gerhart, philip m.; gerhart, andrew l.; hochstein, john i.. munson, young and okiishi's fundamentals of fluid mechanics, 8th edition (page 273). wiley. kindle edition.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.