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.
The smallest planet in regards to both mass and volume is Mercuryâthis tiny world is nearly 20 times less massive than Earth, and its diameter is about times 2 Â½ smaller. In fact, Mercury is closer in size to our Moon than to Earth.The largest planet in our solar system by far is Jupiter, which beats out all the other planets in both mass and volume. Jupiterâs mass is more than 300 times that of Earth, and its diameter is about 11 times larger than Earthâs diameter.he smallest planet in regards to both mass and volume is Mercuryâthis tiny world is nearly 20 times less massive than Earth, and its diameter is about times 2 Â½ smaller. In fact, Mercury is closer in size to our Moon than to Earth.