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.
Mercury is the smallest planet. Mercuryâs diameter is 4879 km, while Earthâs is 12,756 km. In fact, Mercury is not much larger than our Moon, which has a diameter of 3475 km.It is even smaller than a couple of other moons in the Solar System, such as Ganymede (of Jupiter) and Titan (of Saturn).ercuryâs diameter is 4879 km, while Earthâs is 12,756 km. In fact, Mercury is not much larger than our Moon, which has a diameter of 3475 km.