An impeller (also written as impellor or impellar) is a rotor used to increase (or decrease in case of turbines) the pressure and flow of a fluid. An impeller for a dam turbine generator.
The smallest planet in the Solar System is Mercury (the biggest planet is Jupiter). For the longest time, the smallest planet was considered to be Pluto, but now Pluto isnât a planet any more, so weâre back to Mercury.Mercury measures 4879 km along its equator.Just for comparison, Earth is 12,742 km across.So Mercury is only 38% the diameter of Earth.or the longest time, the smallest planet was considered to be Pluto, but now Pluto isnât a planet any more, so weâre back to Mercury. Mercury measures 4879 km along its equator. Just for comparison, Earth is 12,742 km across.
No. The order of size is: Jupiter (largest) Saturn Uranus Neptune Earth Venus Mars Mercury (smallest). So Neptune is the fourth largest planet, not the third.Pluto is now no longer classed as a major planet but is one of the minor planets beyond Neptune. if it had been included in the above list it would have been the smallest, even smaller than Mercury.hen looking for the3rd largest â¦ planet in the solar system: by mass the third largest planet is Neptune (after Jupiter and Saturn).by radius it is Uranus (likewise, after Jupiter and Saturn). 1 person found this useful. JD Heyl.