5. Forces and Motion-I Newton's First Law:
... e.g. a powerless spacecraft far away from all planets (good example) or close to the surface of the Earth (good approximation). Any frame that ...
... e.g. a powerless spacecraft far away from all planets (good example) or close to the surface of the Earth (good approximation). Any frame that ...
Shell structure
... e)What are the limits of nuclear existence? -Where are the drip-lines? -What is the heaviest element we can make? f)Will we see dynamical symmetries far from stability? g)In nuclei with neutron skins will we see the dynamical symmetries of a two-fluid system? H)To what extent will the idea of “criti ...
... e)What are the limits of nuclear existence? -Where are the drip-lines? -What is the heaviest element we can make? f)Will we see dynamical symmetries far from stability? g)In nuclei with neutron skins will we see the dynamical symmetries of a two-fluid system? H)To what extent will the idea of “criti ...
10_WEP_Summary
... In each case, a force is applied to the mass on the left to hold it at a fixed position. At the same time, another force is applied to pull the mass on the right away in a slow and steady way until the final resting position. In both cases, the work done to pull apart the masses do not lead to any i ...
... In each case, a force is applied to the mass on the left to hold it at a fixed position. At the same time, another force is applied to pull the mass on the right away in a slow and steady way until the final resting position. In both cases, the work done to pull apart the masses do not lead to any i ...
Things keep moving or stay at rest, unless a net
... If a person is pushing a cart with a force of 40 Newtons and it accelerates at 0.5 m/s2, what is the mass of the cart? ...
... If a person is pushing a cart with a force of 40 Newtons and it accelerates at 0.5 m/s2, what is the mass of the cart? ...
Energy Forms and Transformations
... accomplish a task. Example: burning fuel allows an engine to do the work of moving a car. ...
... accomplish a task. Example: burning fuel allows an engine to do the work of moving a car. ...
File
... accomplish a task. Example: burning fuel allows an engine to do the work of moving a car. ...
... accomplish a task. Example: burning fuel allows an engine to do the work of moving a car. ...
Elementary Particle and Nuclear Physics Summary
... an alpha or beta particle) interacts with the mixture, it ionizes it. The resulting ions act as condensation nuclei, around which a mist will form (because the mixture is on the point of condensation). The high energies of alpha and beta particles mean that a trail is left, due to many ions being pr ...
... an alpha or beta particle) interacts with the mixture, it ionizes it. The resulting ions act as condensation nuclei, around which a mist will form (because the mixture is on the point of condensation). The high energies of alpha and beta particles mean that a trail is left, due to many ions being pr ...
Lect13
... For a given potential function U(x), one can find the force: Its derivative w.r.t. x is Fx . At equilibrium: dU(x)/dx = 0. ...
... For a given potential function U(x), one can find the force: Its derivative w.r.t. x is Fx . At equilibrium: dU(x)/dx = 0. ...
Concept of a Force
... – Electromagnetic force: This is the principle that keeps atoms together. This is the force which exists between all particles which have an electric charge. • Many everyday experiences such as friction and air resistance are due to this force. This is also the resistant force that we feel, for exam ...
... – Electromagnetic force: This is the principle that keeps atoms together. This is the force which exists between all particles which have an electric charge. • Many everyday experiences such as friction and air resistance are due to this force. This is also the resistant force that we feel, for exam ...
Word version of Episode 214
... We say that work is done by a force when the object concerned moves in the direction of the force, and the force thereby transfers energy from one object to another. You can be a typical physics teacher and use a board rubber to illustrate your point about energy gain. Alternatively, use some other ...
... We say that work is done by a force when the object concerned moves in the direction of the force, and the force thereby transfers energy from one object to another. You can be a typical physics teacher and use a board rubber to illustrate your point about energy gain. Alternatively, use some other ...
Name
... horizontally between two objects which are in contact with each other. Force (Friction) Ff N The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. The friction force opposes the motion of the object. For example, if a book moves acros ...
... horizontally between two objects which are in contact with each other. Force (Friction) Ff N The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. The friction force opposes the motion of the object. For example, if a book moves acros ...
DG o rxn
... Aluminum (Al), the third most abundant elements on Earth crust as bauxite or alumina Al2O3, remain unknown to man until 1827, because it is very reactive. By then, Wohler obtained some Al metal by reducing Al2O3 with potassium vapore. In 1886, two young men electrolyzed molten cryolite Na3AlF6 (melt ...
... Aluminum (Al), the third most abundant elements on Earth crust as bauxite or alumina Al2O3, remain unknown to man until 1827, because it is very reactive. By then, Wohler obtained some Al metal by reducing Al2O3 with potassium vapore. In 1886, two young men electrolyzed molten cryolite Na3AlF6 (melt ...
Nuclear force
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.