Physics is a subject that studies the most general laws of material movement and the basic structure of material. Physics, as the leading discipline of natural science, studies the most basic motion forms and laws of all substances from the universe to elementary particles, so it has become the research basis of other natural science disciplines.
Horizontal plane (pínɡ m àn):
1. The plane formed by completely still water also refers to the plane parallel to this plane.
2. (biology, medicine) The horizontal plane is also called? The transverse plane perpendicular to the longitudinal axis divides the human body into upper and lower parts.
3. Reference planes and coordinate planes for scientific research or observation.
4. In mathematics, a plane composed entirely of horizontal parallel straight lines.
5. The plane parallel to the H plane in mechanical drawing.