Vertical social networks

The users of vertical networks form communities who have similar reason for using aplication.

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Rich site Summary

RSS is a subscription device that provide users with frequent updates from media websites, blogs and other sources of information. RSS news feeds are convenient and time saving. Since subscribers receives the news automatically.
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PULLEYS AND COMPOUND PULLEY SYSTEMS

In a system of pulleys the equilibrium between the forces depends on the path that the rope follows. PULLEYS: FIXED PULLEY :  Has an axle mounted in bearings attached to a supporting structure. A fixed pulley changes the direction of the force on a rope or belt that moves along its circumference.  F: R MOVEABLE PULLEY:   Has an axle in a movable block. A single movable pulley is supported by two parts of the same rope and has a mechanical advantage of two. F: R/2
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1.Energy

Energy is the capacity of a body to perform transformations and do work -Form of enery                                         - Description Potential                                    Associated with the height of an object above the grand. Kinetic                                     The energy of physical movement Mechanical                              The sum of potential and kinetic energy Sound                                      The energy of sond waves,which are produced by vibrations Electrical           ...
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