Introductory physics Introductory physics In physics, Ampère's law is the magnetic equivalent of Gauss's law, discovered by André-Marie Ampère. It relates the circulating magnetic field in a closed loop to the electric current passing through the loop. ...more on Wikipedia about "Ampère's law"
An object's weight, henceforth called "actual weight", is the downward force exerted upon it by the earth's gravity. By contrast, an object's apparent weight is the upward force (the normal force, or reaction force), typically transmitted through the ground, that opposes gravity and prevents a supported object from falling. ...more on Wikipedia about "Apparent weight"
The Biot-Savart law is a physical law with applications in both electromagnetics and aerodynamics. As originally formulated, the law describes the magnetic field set up by a steady current density. More recently, by a simple analogy between magnetostatics and fluid dynamics, the same law has been used to calculate the velocity of air induced by vortex lines in aerodynamic systems. ...more on Wikipedia about "Biot-Savart law"
In physics, buoyancy is an upward force on an object immersed in a fluid (i.e. a liquid or a gas), enabling it to float or at least to appear lighter. Buoyancy is important for many vehicles such as boats, ships, balloons, and airships. ...more on Wikipedia about "Buoyancy"
Charge density is the amount of electric charge per length, area, or volume. ...more on Wikipedia about "Charge density"
In physics, a contact force is a force between two objects (or an object and a surface) that are in contact with each other. This is distinct from a force that acts over a distance, such as gravity or magnetic attraction/repulsion. ...more on Wikipedia about "Contact force"
In physics, Coulomb's law is an inverse-square law indicating the magnitude and direction of electrostatic force that one stationary, electrically charged object of small dimensions (ideally, a point source) exerts on another. ...more on Wikipedia about "Coulomb's law" You've Got Questions. We've Got shortopedia. Introductory_physics
Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass divided by its total volume. A denser object (such as iron) will have less volume than an equal mass of some less dense substance (such as water). ...more on Wikipedia about "Density"
An elastic collision is a collision in which the total kinetic energy of the colliding bodies after collision is equal to their total kinetic energy before collision. Elastic collisions occur only if there is no conversion of kinetic energy into other forms, as in the collision of atoms ( Rutherford backscattering is one example). ...more on Wikipedia about "Elastic collision"
The elastic potential energy stored in an elastic string or spring of natural length l and modulus of elasticity λ under an extension of x is given by: ...more on Wikipedia about "Elastic potential energy"
Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between charge and field is the source of one of the four fundamental forces, the electromagnetic force. ...more on Wikipedia about "Electric charge"
In physics, an electric field or E-field is an effect produced by an electric charge (or a time-varying magnetic field) that exerts a force on charged objects in the field. The SI units of the electric field are newtons per coulomb or volts per meter (both are equivalent). Electric fields are composed of photons and contain electrical energy with energy density proportional to the square of the field intensity. Electric fields exist around all charges; the direction of field lines at a point is defined by the direction of the electric force exerted on a positive test charge placed at that point. The strength of the field is defined by the ratio of the electric force on a charge at a point to the magnitude of the charge placed at that point. In the dynamic case the electric field is accompanied by a magnetic field, by a flow of energy, and by real photons. ...more on Wikipedia about "Electric field"
Electric potential is the potential energy per unit charge associated with a static (time-invariant) electric field, also called the electrostatic potential, typically measured in volts. ...more on Wikipedia about "Electric potential"
Electron cloud is a term used for introducing the concept of wavefunction in low-level pedagogical introductions to atomic physics, molecular physics, chemistry or quantum chemistry. This idea corresponds to delocated electrons moving or standing like clouds around the atomic or molecular nuclei. This is indeed a better image than the very common image provided by the Bohr model which commonly leads to a visualisation of electrons driving around the nuclei along orbits like the planets around the sun. ...more on Wikipedia about "Electron cloud" The text you are reading is from www.shortopedia.com
Energy is a measure of being able to do mechanical work. It is a fundamental concept pertaining to the ability for action. In physics, it is a quantity that every physical system possesses. This quantity is not absolute but relative to a state of the system known as its reference state or reference level. The energy of a physical system is defined as the amount of mechanical work that the system can produce if it changes its state to its reference state; for example if a liter of water cools down to 0 °C or if a car hits a tree and decelerates from 120 km/h to 0 km/h. ...more on Wikipedia about "Energy"
In physics and engineering, including mechanical and electrical engineering, energy efficiency is a dimensionless number, with a value between 0 and 1. The energy efficiency of a process is defined as: ...more on Wikipedia about "Energy efficiency"
Faraday's law of induction gives the relation between the rate of change of the magnetic flux through the surface S enclosed by a contour C and the electric field induced along the contour: ...more on Wikipedia about "Faraday's law of induction"
A fictitious force is a force used to explain acceleration in a non- inertial frame of reference, such as a rotating frame. ...more on Wikipedia about "Fictitious force"
In physics, a force is an external cause responsible for any change of a physical system. For instance, a person holding a dog by a rope is experiencing the force applied by the rope on their hand, and the cause for its pulling forward is the force exercised by the rope. The kinetic expression of this change is, according to Newton's second law, acceleration, but non-kinetic expressions such as deformation can also occur. The SI unit for force is the newton. ...more on Wikipedia about "Force"
Free body is the generic term used by physicists and engineers to describe some thing—be it a bowling ball, a spaceship, pendulum, a television, or anything else—which can be considered as moving as a single unit. The object doesn't have to be "free" in the usual sense of the word—it could be completely prevented from going anywhere, or it could be trapped in an orbit. The crucial element is that the physicist can think of it as a single unit to the extent that it either does or does not move, as the case may be. ...more on Wikipedia about "Free body"
Drawing a free body diagram is a method often used by physicists working out kinetics or other mechanics problems to show all the mechanical vector forces acting on the given free body (or bodies) at any given time. Doing so can make it easier to understand the forces, and moments, in relation to one another and suggest to the physicist the proper trigonometry to apply in order to find the solution to the problem. ...more on Wikipedia about "Free body diagram"
Free-fall or free fall in the strict sense is the condition of acceleration which is due only to gravity. In other words, the objects undergoing free fall experience only one force: their own weight. ...more on Wikipedia about "Free-fall"
In physics and mathematical analysis, Gauss's law gives the relation between the electric flux flowing out a closed surface and the electric charge enclosed in the surface. ...more on Wikipedia about "Gauss's law"
:This article is about the physical concept of gravitation. For information on the manga/anime series, see Gravitation (manga) ...more on Wikipedia about "Gravitation"
In physics, gravitational potential is the potential energy per unit mass of an object due to its position in a gravitational field. The gravitational potential due to a point mass M is ...more on Wikipedia about "Gravitational potential"
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