Search results

...n is about one twelfth the complete surface area of the sphere, regardless of how big the sphere is.<ref>{{Cite web|url=https://mathworld.wolfram.com/Ste * The surface area of a sphere is <math>4\pi r^2</math> ...

...f a [[material]] is needed to make a hollow container. Area is the amount of surface covered by a close object or shape. ...ref>{{Cite web|title=What is Area?|url=https://www.mathsisfun.com/geometry/area.html|access-date=2020-09-24|website=www.mathsisfun.com}}</ref> ...

...[[vacuum]] during a [[time]] interval of <math>\frac{1}{299792458}</math> of a [[second]]. ...he length of a meter, but a square kilometer is one million times the area of a square meter. ...

...of "intensity". (Average energy or volume delivered per unit time per unit area.)]] ...t have an intensity of 100 buckets of [[water]] per minute per open window of a certain size in a burning building. ...

...side can be called a ''cylinder''. The [[surface area]] and the [[volume]] of a cylinder have been known since ancient times. ...more broadly as a ruled surface which is spanned by a one-parameter family of [[parallel]] lines. A cylinder whose [[Cross section (geometry)|cross secti ...

...he fourth power (e.g. <math>m^4</math> or <math>in^4</math>), while moment of inertia is mass times length squared (e.g. <math>kg*m^2</math> or <math>lb* ...en denoted by the letter, <math>I</math>, the '''polar''' second moment of area is most often denoted by either, <math>I_z</math>, or the letter, <math>J</ ...

...ector]] notation, the electric flux <math>d\Phi_E\,</math> through a small area <math>d\mathbf{A}</math> is given by where '''E''' is the electric field and d'''A''' is a differential area on the surface <math>S</math> with an outward facing [[surface normal]] def ...

...sed with [[mass]]. The volume of a mountain is much larger than the volume of a rock, for instance. * The [[width]] (or breadth) refers to the size of the object in a direction perpendicular to its length. ...

...e based, is very [[:wikt:similar|similar]] but there are some [[Comparison of the Imperial and US customary systems|differences]]. ...e units include the [[inch]], [[Foot (unit of length)|foot]], [[Yard (unit of length)|yard]] and [[mile]]. ...

...ents and the [[torque]] that a [[magnetic field]] will exert on it. A loop of [[electric current]], a bar [[magnet]], an [[electron]], a [[molecule]], an ...direction of its magnetic dipole moment, and decreases as the inverse cube of the distance from the object. ...

...a separator (as in 1:4:9),<ref>{{Cite web|date=2020-03-01|title=Compendium of Mathematical Symbols|url=https://mathvault.ca/hub/higher-math/math-symbols/ ...ram]]s of flour, 300 grams of butter and 25 grams of sugar, then the ratio of flour to butter to sugar is written as 100:300:25 (and pronounced as "100 t ...

...rical engineering]]. It is a measure of how much a material stops the flow of [[electric current]] through it. Most metals have very low electrical resis ...uch electrical resistivity there is. Electrical resistivity is the inverse of [[electrical conductivity]]. This term is more used for [[semiconductor]]s ...

|Loudness || 0.67 || Sound pressure of 3000&nbsp;Hz tone |Vibration || 0.95 || Amplitude of 60&nbsp;Hz on finger ...

...n volume has high density. An object with little matter in the same amount of volume has a low density. Density is found by dividing the [[mass]] of an object by its [[volume]]: ...

...c field is shown by the direction of the magnetic flux lines. The strength of a magnet has to do with the spaces between the magnetic flux lines. The clo ...s of [[tesla (unit)|teslas]] ([[SI unit]]s) or [[gauss (unit)|gauss]] (cgs units). ...

...sectional area) bar. The stress or force distribution in the cross section of the bar is not necessarily uniform. However, an average normal stress <math ...in a prismatic bar. The stress or force distribution in the cross section of the bar is not necessarily uniform. Nevertheless, an average shear stress < ...

...orentz force equation]], give everything one needs to calculate the motion of classical particles in electric and magnetic fields. ...ic fields 'circulate' around time varying magnetic fields: [[Faraday's law of induction|Faraday's law]]. ...

...h the loop. It is now one of [[Maxwell's equations]], which form the basis of [[classical physics|classical]] [[electromagnetism]]. ...magnetic fields]]. Again, the two forms are equivalent (see the "[[#Proof of equivalence|proof]]" section below). ...

...are number''', sometimes also called a '''perfect square''', is the result of an [[integer]] [[Operation (mathematics)#Multiplication|multiplied]] by its ...pronounced as "''n'' squared". The name square number comes from the name of the shape; see [[#Properties|below]]. ...

...to each other ([[cohesion]]), and is responsible for many of the behaviors of liquids. ...[[area]]. The two are equivalent—but when referring to energy per unit of area, people use the term [[surface energy]]—which is a more general term in the ...