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Physics establishes the relationships among various substances in various conditions. Behavior of various substances and changes in them is explained by principles in Physics.

Physics identifies properties of materials and nature.  The way to generate electricity is identified by Physics principle : electromagnetic induction, for example.

   Technology is the a method of realizing a formula using a class of materials, and a particular technique related to precision or production.   So a particular technology is employed in manufacturing & engineering of electricity generation or distribution.  Similarly, if a new semiconductor material is found better than Silicon, or, a more precise way of making a more complex electronic chip is known by physics, then a suitable technology is required to manufacture it.

   The manufactured products are used for the benefit of the society and the people.  The people accept the product and its technology or reject it depending on convenience and cost.  Then technology is improved to bring another product to satisfy the people.

   The science (and research), technology (new or improved), engineering and society (use, accept/reject) cycle continues for ever in the world.  Huge mainframe computers to small laptops are made by this cycle of activities by generations of people.

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