17 Equation that changed the world



Credit:#physicist group

Comments

Post a Comment

Popular posts from this blog

Image
                                               REFRACTION AT PLANE SURFACES Refraction is a phenomenon, due to which a ray of light deviates from its original path, while travelling from one optical medium to another optical medium. The change of direction is caused by a change in speed of light in different medium. For example, when light travels from air into water, it slows down; causing it to continue to travel at a different direction as a result it deviates. In the case of homogeneous medium light travels along a straight line. Refraction is the bending property of light as it passes from one transparent medium to another. When light passes from a less dense to more dense medium, (for example passing from air into water), the light is refracted (or bent) towards the normal as shown in [Fig. 15.1]. The bending occurs because light travels slowly in a denser medium...
Read more

Friction

Image
  Friction - Friction is a property related to two surfaces in contact, which opposes the relative motion (or tendency to slip) between them. The force responsible is called frictional force. Friction is due to: 1.Interlocking                        2.Cold welding In case of fluids we call it viscosity. 1. Interlocking: - A n interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. 2.Cold welding: - Cold welding or contact welding is a solid-state welding process in which joining takes place without fusion/heating at the interface of the two parts to be welded. Magnitude of Friction                                           F=friction force                    mue= coeffic...
Read more