Showing posts with label nuclear. Show all posts
Showing posts with label nuclear. Show all posts

Wednesday, October 26, 2011

Moving Things by Force

That which causes a free body to undergo acceleration is called foece.
There are four fundamental forces in Nature. They are gravity which is the mutual attraction of all matter in the universe it is what holds you to the Earth, electromagnetism which is the mutual attraction and repulsion of charged partials, the weak nuclear force is that which regulates types of nuclear decay such as Bata decay by overcoming the strong nuclear force and the strong nuclear force is the binding force that holds the atomic nucleus together against the tendency of positively charged protons.

Force causes mater to accelerate which is the main function of force by definition. It can be used to overcome other forces such as friction gravity. Force also holds things together since the electromagnetic force holds an object together including your body and the strong nuclear force holds atomic nuclei together. It can break things apart such as bombs or the force resulting from ramming two things together which can cause them to shatter and the peaces to fly apart.
Regardless of its source force causes acceleration. Force can also stop acceleration by resisting another force. Force holes thing together so force does indeed bind us together

Monday, October 24, 2011

The Work of Energy In Physics

The ability of a system to do work is called energy and Special Relativity shows that energy has mass and that the mass of all matter is a result of energy, so that all substance is based on energy. The 1st Law of Thermodynamics states that the energy in any interaction is conserved. The result is that is the total amount of energy in the universe is constant. It is also stated as energy can not be created or destroyed but it can change forms.

Here are some common types of energy. Heat energy is the energy associated with the temperature of an object. Light energy is the energy associated with visible light. Electrical energy is the energy associated with an electric current. Chemical energy is the energy associated with the reactions involving molecules. Nuclear energy is the energy associated with reactions involving atomic nuclei. Kinetic energy is the energy associated with motion.  Potential energy is the energy of a system based on its position or condition. Stored energy. Rest mass energy is the energy of an object that is not in motion. E= mc2.

Energy is one of the three main parts of the Universe space, time and mass and relativity shows them to be inter-related. Space and time are so interrelated that they form a single entity. Furthermore mass warps space-time forming Gravity and the motion of mass contracts both space and time. 

In conclusion in common experience energy is what moves us and allows us to move thing. Physics has shown it to be a lot more. It is a fundamental part of the universe.