![Ch 6 Newton`s Third Law Summary](http://s1.studyres.com/store/data/014677698_1-0e57e3a4cd5effd71e93570a0dee9e9d-300x300.png)
Edexcel Additional Science revision P2 –Topic 1: Static and Current
... Edexcel Additional Science revision P2 – Topic 6: Advantages and Disadvantages of using radioactive materials. How did we initially discover the hazards associated with radioactive sources? How have our ideas about these changed over ...
... Edexcel Additional Science revision P2 – Topic 6: Advantages and Disadvantages of using radioactive materials. How did we initially discover the hazards associated with radioactive sources? How have our ideas about these changed over ...
Work (W) done by a constant force F exerted on an object through
... For the system that has only mechanical energy (ME = PE + KE) and there is no frictional force acting on it, so no mechanical energy is converted into heat, mechanical energy is conserved ...
... For the system that has only mechanical energy (ME = PE + KE) and there is no frictional force acting on it, so no mechanical energy is converted into heat, mechanical energy is conserved ...
Atomic Number and Mass Number
... number of protons in an atom of that element. • All atoms of any given element have the same atomic number. • Each hydrogen atom has one proton in its nucleus. • Hydrogen is assigned the atomic number 1. ...
... number of protons in an atom of that element. • All atoms of any given element have the same atomic number. • Each hydrogen atom has one proton in its nucleus. • Hydrogen is assigned the atomic number 1. ...
force-2 - CBSEcare.in
... Newton's second law states that "the force acting on a body is directly proportional to the product of the mass of the body and the acceleration produced in it, the acceleration being in the direction of the force applied." (b) Expression (equation for force) Let a force F acting on a body of mass m ...
... Newton's second law states that "the force acting on a body is directly proportional to the product of the mass of the body and the acceleration produced in it, the acceleration being in the direction of the force applied." (b) Expression (equation for force) Let a force F acting on a body of mass m ...
Some words about fundamental problems of physics
... magnetic moments of the neutron and proton, n / p , known from experience (1). As for the calculation of absolute values of the magnetic moments with a reasonable accuracy, this problem is not solved in the framework of the QCD. And, in general, in our opinion, the problem is unsolvable in princ ...
... magnetic moments of the neutron and proton, n / p , known from experience (1). As for the calculation of absolute values of the magnetic moments with a reasonable accuracy, this problem is not solved in the framework of the QCD. And, in general, in our opinion, the problem is unsolvable in princ ...
Modern Model
... Since Bohr, the model of the atom has become even more sophisticated. Scientists had to explain why even the thin lines in an emission spectrum could be resolved into more fine lines, and they had to include the discovery of neutrons into their model. The atom is the smallest unit of an element that ...
... Since Bohr, the model of the atom has become even more sophisticated. Scientists had to explain why even the thin lines in an emission spectrum could be resolved into more fine lines, and they had to include the discovery of neutrons into their model. The atom is the smallest unit of an element that ...
atomic nuclei without neutrons
... As singular particles, electrons only occur in the electron shells around the atomic nucleus and do not occur inside the atomic nucleus. Free neutrons are unstable and decay into one proton, one electron and one antineutrino/energy. -) Strong and weak nuclear force: In order to keep together the str ...
... As singular particles, electrons only occur in the electron shells around the atomic nucleus and do not occur inside the atomic nucleus. Free neutrons are unstable and decay into one proton, one electron and one antineutrino/energy. -) Strong and weak nuclear force: In order to keep together the str ...
Net Force Help Sheet - The Physics Classroom
... contact with another stable object. For example, if a book is resting upon a surface, then the surface is exerting an upward force upon the book in order to support the weight of the book. On occasions, a normal force is exerted horizontally between two objects which are in contact with each other. ...
... contact with another stable object. For example, if a book is resting upon a surface, then the surface is exerting an upward force upon the book in order to support the weight of the book. On occasions, a normal force is exerted horizontally between two objects which are in contact with each other. ...
Journey from Bottle to Bang Insignificant though this bottle of
... to leave hydrogen nuclei. These are protons and have a positive charge, enabling them to be accelerated by an electric field. Their journey to eventually take part in ultra high energy collisions, similar to those following the Big Bang, can now begin. This initial acceleration has caused Linac 2 ha ...
... to leave hydrogen nuclei. These are protons and have a positive charge, enabling them to be accelerated by an electric field. Their journey to eventually take part in ultra high energy collisions, similar to those following the Big Bang, can now begin. This initial acceleration has caused Linac 2 ha ...
Investigating Friction
... Investigating Friction In this experiment you will investigate the effects of changing normal force, surface area, and type of surface on the static and kinetic friction between the surfaces. The premise of this investigation is that we can measure both the frictional resistance and the normal force ...
... Investigating Friction In this experiment you will investigate the effects of changing normal force, surface area, and type of surface on the static and kinetic friction between the surfaces. The premise of this investigation is that we can measure both the frictional resistance and the normal force ...
Nuclear force
![](https://commons.wikimedia.org/wiki/Special:FilePath/ReidForce2.jpg?width=300)
The nuclear force (or nucleon–nucleon interaction or residual strong force) is the force between protons and neutrons, subatomic particles that are collectively called nucleons. The nuclear force is responsible for binding protons and neutrons into atomic nuclei. Neutrons and protons are affected by the nuclear force almost identically. Since protons have charge +1 e, they experience a Coulomb repulsion that tends to push them apart, but at short range the nuclear force is sufficiently attractive as to overcome the electromagnetic repulsive force. The mass of a nucleus is less than the sum total of the individual masses of the protons and neutrons which form it. The difference in mass between bound and unbound nucleons is known as the mass defect. Energy is released when nuclei break apart, and it is this energy that used in nuclear power and nuclear weapons.The nuclear force is powerfully attractive between nucleons at distances of about 1 femtometer (fm, or 1.0 × 10−15 metres) between their centers, but rapidly decreases to insignificance at distances beyond about 2.5 fm. At distances less than 0.7 fm, the nuclear force becomes repulsive. This repulsive component is responsible for the physical size of nuclei, since the nucleons can come no closer than the force allows. By comparison, the size of an atom, measured in angstroms (Å, or 1.0 × 10−10 m), is five orders of magnitude larger. The nuclear force is not simple, however, since it depends on the nucleon spins, has a tensor component, and may depend on the relative momentum of the nucleons.A quantitative description of the nuclear force relies on partially empirical equations that model the internucleon potential energies, or potentials. (Generally, forces within a system of particles can be more simply modeled by describing the system's potential energy; the negative gradient of a potential is equal to the vector force.) The constants for the equations are phenomenological, that is, determined by fitting the equations to experimental data. The internucleon potentials attempt to describe the properties of nucleon–nucleon interaction. Once determined, any given potential can be used in, e.g., the Schrödinger equation to determine the quantum mechanical properties of the nucleon system.The discovery of the neutron in 1932 revealed that atomic nuclei were made of protons and neutrons, held together by an attractive force. By 1935 the nuclear force was conceived to be transmitted by particles called mesons. This theoretical development included a description of the Yukawa potential, an early example of a nuclear potential. Mesons, predicted by theory, were discovered experimentally in 1947. By the 1970s, the quark model had been developed, which showed that the mesons and nucleons were composed of quarks and gluons. By this new model, the nuclear force, resulting from the exchange of mesons between neighboring nucleons, is a residual effect of the strong force.