Standard rigid threaded conduit fittings can be used with I.M.C. Electrical metallic tubing is not threaded, and must be connected to junction boxes and the like with conduit connectors that secure to the tubing by means of a set screw or collet and nut; then the connectors have integrated shoulders and threads that secure to the box with a nut.
The  Earth  is a planet. It is a spherical-shaped mass of matter in time and space. The  world  is the specific set of conditions prevailing upon the face of the planet Earth at a specific point in Biblical time.he old world was the first generation of the heaven and the Earth (Genesis 1:1). The heavens and Earth  which are now  are the second generation of the heavens and the Earth. It is the same planet Earth but different worlds upon the face of the same planet.
Mars/Earth Comparison Table. Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area. This is because over two-thirds of the Earth's surface is covered by oceans, whereas the present surface of Mars has no liquid water. Mars and Earth are very different planets when it comes to temperature, size, and atmosphere, but geologic processes on the two planets are surprisingly similar.