What's the difference between classic physics and modern physics?
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Classical physics is everything before Max Plank and quantum mechanics. The reason is simple; Plank sent the world of physics into a tailspin with his discoveries. Quantum physics is revealing to us the intricate nature of the workings of reality - and we are all baffled. Nobody can make any sense out of it. There are theories, but none really suffice. Even Einstein spent the remainder of his career trying to reconcile his relativity with quantum theory, but to no avail. In fact, he once called the quantum field "spooky". Contemporary scientists have begun to openly question weather we have somehow stumbled onto "mystical" truths. Check-out the Wheeler- De-Witt equation (as one example). It is an equation that was accidentally discovered. John Wheeler actually refers to it as "that damned equation" because of the frustrating nature of its resolution. It produces an answer that just cant be, based on our understanding of the universe: yet it is what it is! The answer to your question is this. They had to divide physics into two branches because of the explosive repercussions that this scientific field had on the world of physics in general. Both branches produce equally valid answers to our questions. Yet, they are equally incommensurate with each other.
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The early branch of physics, developed mainly by Newton and his contemporaries is what we call Classical Mechanics. [The developments of physics after 1900 is covered mainly by the Quantum Mechanics and is called the Modern Physics.]
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Classical mechanics courses usually cover the laws of mechanics formulated as Lagrangian and Hamiltonian systems.  These are useful for the analysis of multi particle systems whch arise in physics (planet mechanics, plasmas, electron beams, etc) but usually fall ooutside the domain of mechanical engineering.  \n\nI'm a EE but found classical mechanics to be a useful course set.
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in the classical world, a thing is on or off, in quantum physics it can be on, off, or both on AND off at the same time.\n\ni can either throw a brick at your face, or have it in my hand, in the quantum world, i could have it in my hand and hitting you in the face.
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Physics for Scientists and Engineers: extended version, Fifth Edition, Tipler & Mosca (Freeman. 2003).\n\nhttp://www.phy.cam.ac.uk/teaching/1A_2004-2005.pdf\n\nBAD KARMA,!!   WTF  Learn to spell douche!!\n\n:> peace
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An electric field due to stationary positive or negative electric charges starts to look a bit like a magnetic field due to north and south magnetic poles when you move through it faster and faster.   If you could reach the speed of light it would look exactly like a magnetic field, and conversely a magnetic field looks more and more like an electric field the faster you move.   The reason physicists lump these two phenomena together is that they're two aspects of the same thing, and what they both look like depends on how fast you're moving through the electric or magnetic field.   So the answer to your question is yes, there's a difference, and yes, electricity always involves magnetism.   An electromagnetic wave, like light, consists of an oscillating electric field which produces an oscillating magnetic field which produces an oscillating electric field which...
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You have classical physics (before the 1900s) and you have modern physics (after 1900).  Modern physics is when Einstein developed his E = mc^2 theory.  He and several other scientists of the time developed quantum physics to answer questions that classical physics couldn't answer.  When a quantity is quantized it means that it is converted from the classical quantity to the quantum quantity (involves complicated math).  This is a quick version answer to your question.  Hope it helps.\n\nG
1162008
Most of these principles are addressed in detail in physics text books.  Perhaps you might try at a local college or high school  library.
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The latest developments are very technical and hard to translate into non-mathmatical terms that lend themselves to this format.  Check the physics journals for the latest (see the link below).\n\nIn general lay terms, some of these developments include time evolution, D-branes, a variety of developments on tachyons, guage fixing, and time lumps.
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Take a physics class.  It's mostly common sense.
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i love Physics, but not either of them are that easier, u see!\n so do as ur heart says to do!
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Physics is the science of matter and energy and of interactions between the two items\n\nChemistry is the study of the nature, properties, and composition of matter, and how these undergo changes
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These are very thorough answers.  But you asked for "simple," so here goes...\n\nAccording to string theory, "strings" are the fundamental building block of all matter...the old fashioned ones (atoms and/or their consituent parts) are in fact nothing more than strings vibrating a certain way.  If they vibrate one way, they're electrons.  If they vibrate another way, they're protons.  And so on.
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the importance of physics?? it is very imp cos if there wasn't pysics we wouln't know how things work. there wouldn't be neither electricity nor magnetism. you wouldn't live as comfortable as you live today...is this enough? :)
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the answer given by " classic " is sufficient, so also plz select his answer as best answer
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hmmm... \n\nWell the book that got me turned on to physics was "The source book on atomic energy"\n\nThis book starts off at newton and goes up to the nuclear reactors and basicly every thing that was known about nuclear technoolgy at the time (the book is about 50 years old).  It is not quantum mechanics, but it is modern physics.  And modern physics is the start to quantum.  It will give you ALL the backround that you need to know to start to really learn quantum. Also it is very easy to read (I read it the summer after my freshman year in college)  \n\nanother serise of book (also not quite to hard quantum yet) are the "Mr Tompkins" series.  he describes things like the atom and relitivity very well and in a hands on approch.  \n\n\nNow for quantum... I did read one decent book, but i can not remeber what it was.  Just go to your local library and do a search for quantum mechanics and pick up the shortest paper back you can find.  they are all written by very smart people and they are writen so that every on can under stand them.  \n\nI am sorry I did not help to much with a Quantum book, but the other two books that I recomended are very good and will put you directely on the right path towards understanding modern physics,  and you can not understand quantum with out understanding modern (actualy there is usualy a bit of quantum is modern physics classes)
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Physics is the scientific study of matter and energy and how they interact with each other.\n\nGood reading on the daily use of physics at such as levers, wheels and axles, inclines, screws at:\n\nhttp://physics.about.com/od/physicsintherealworld/