![Chapter 33: The Atomic Nucleus and Radioactivity](http://s1.studyres.com/store/data/001123517_1-f0634803978f9bbc7810e62f5b858c93-300x300.png)
Chapter 33: The Atomic Nucleus and Radioactivity
... Ans. Alpha rays consist of positively charged helium nuclei. Beta rays consist of negatively charged electrons. Gamma rays are uncharged photons of light. A magnetic field will apply a force to a moving charged particle. Positively charged particles are accelerated in one direction and negative char ...
... Ans. Alpha rays consist of positively charged helium nuclei. Beta rays consist of negatively charged electrons. Gamma rays are uncharged photons of light. A magnetic field will apply a force to a moving charged particle. Positively charged particles are accelerated in one direction and negative char ...
Test Review Packet- Newton`s Laws and Friction
... If force F is required to slide the block at constant speed across the table on surface A, approximately what force is required to slide the block at constant speed across the table on surface B? a. F b. 2F c. d. 4F 16. On the surface of planet X, the acceleration due to gravity is 16 meters pe ...
... If force F is required to slide the block at constant speed across the table on surface A, approximately what force is required to slide the block at constant speed across the table on surface B? a. F b. 2F c. d. 4F 16. On the surface of planet X, the acceleration due to gravity is 16 meters pe ...
Giancoli Ch 4 (Used in Class)
... spew out of the tail of the rocket at high speeds. The reaction force is what propels the rocket. Note that the rocket does not need anything to “push” against. ...
... spew out of the tail of the rocket at high speeds. The reaction force is what propels the rocket. Note that the rocket does not need anything to “push” against. ...
Particle emission from a hot, deformed, and rotating nucleus
... neutrons and protons which are confined in the finite nuclear volume and satisfy the Fermi-Dirac statistics. The volume f2 with the surface Z may have any shape. In addition we assume that the deformed volume is in rigid rotation. For simplification we restrict ourselves to an axially symmetric nucl ...
... neutrons and protons which are confined in the finite nuclear volume and satisfy the Fermi-Dirac statistics. The volume f2 with the surface Z may have any shape. In addition we assume that the deformed volume is in rigid rotation. For simplification we restrict ourselves to an axially symmetric nucl ...
Physics Lesson 4 Linear Motion
... the net force on it being zero, the object is in a state of equilibrium ...
... the net force on it being zero, the object is in a state of equilibrium ...
1 Honors Physics, Unit Four, Newton`s Laws, Worksheet (key) 1
... 1. Consider hitting a baseball with a bat. If the force of the bat pushing on the ball is the action force, what is the reaction force? The force of the ball pushing on the bat is the reaction force. 2. Do action and reaction pairs of forces cancel/balance one another? The action reaction forces are ...
... 1. Consider hitting a baseball with a bat. If the force of the bat pushing on the ball is the action force, what is the reaction force? The force of the ball pushing on the bat is the reaction force. 2. Do action and reaction pairs of forces cancel/balance one another? The action reaction forces are ...
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.