• Rho (redirect from Ρ)
    Rho (/ˈroʊ/; uppercase Ρ, lowercase ρ or ϱ; Greek: ρο or ρω) is the seventeenth letter of the Greek alphabet. In the system of Greek numerals it has a...
    7 KB (643 words) - 13:27, 15 June 2024
  • several subscripted letters and symbols: Latin/IPA ᵢ ᵣ ᵤ ᵥ and Greek ᵦ ᵧ ᵩ ᵪ. The Cyrillic Extended-D block also contains many Cyrillic subscripts:...
    46 KB (2,735 words) - 22:52, 20 August 2024
  • S = A ρ ( ϕ ) d ρ − A ρ ( ϕ + d ϕ ) d ρ + A ϕ ( ρ + d ρ ) ( ρ + d ρ ) d ϕ − A ϕ ( ρ ) ρ d ϕ ρ d ρ d ϕ = − 1 ρ ∂ A ρ ∂ ϕ + 1 ρ ∂ ( ρ A ϕ ) ∂ ρ {\displaystyle...
    34 KB (2,828 words) - 19:08, 26 July 2024
  • Thumbnail for Spearman's rank correlation coefficient
    correlation coefficient or Spearman's ρ, named after Charles Spearman and often denoted by the Greek letter ρ {\displaystyle \rho } (rho) or as r s {\displaystyle...
    32 KB (4,260 words) - 09:36, 22 August 2024
  • Thumbnail for Relative density
    between apparent and true relative density: R D A = ρ s ρ w − ρ a ρ w 1 − ρ a ρ w = R D V − ρ a ρ w 1 − ρ a ρ w . {\displaystyle RD_{\mathrm {A} }={{\rho _{\mathrm...
    37 KB (5,814 words) - 03:58, 17 August 2024
  • Thumbnail for Bernoulli's principle
    setting 0 = ΔE1 − ΔE2: 0 = ( 1 2 ρ 1 v 1 2 + Ψ 1 ρ 1 + ε 1 ρ 1 + p 1 ) A 1 v 1 Δ t − ( 1 2 ρ 2 v 2 2 + Ψ 2 ρ 2 + ε 2 ρ 2 + p 2 ) A 2 v 2 Δ t {\displaystyle...
    74 KB (10,139 words) - 16:23, 26 June 2024
  • Look up rho, Rho, Ρ, or ρ in Wiktionary, the free dictionary. Rho (Ρ or ρ) is the 17th letter of the Greek alphabet. Rho or RHO also may refer to: Rho...
    2 KB (235 words) - 11:19, 9 June 2024
  • resistivity relation is given by: [ E x E y E z ] = [ ρ x x ρ x y ρ x z ρ y x ρ y y ρ y z ρ z x ρ z y ρ z z ] [ J x J y J z ] , {\displaystyle...
    75 KB (7,945 words) - 04:31, 1 September 2024
  • Thumbnail for Cylindrical coordinate system
    ρ ρ ^ + 1 ρ ∂ f ∂ φ φ ^ + ∂ f ∂ z z ^ ∇ ⋅ A = 1 ρ ∂ ∂ ρ ( ρ A ρ ) + 1 ρ ∂ A φ ∂ φ + ∂ A z ∂ z ∇ × A = ( 1 ρ ∂ A z ∂ φ − ∂ A φ ∂ z ) ρ ^ + ( ∂ A ρ ∂...
    18 KB (2,136 words) - 02:44, 23 May 2024
  • is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: ρ =...
    35 KB (3,297 words) - 17:44, 8 August 2024
  • Thumbnail for Pearson correlation coefficient
    confidence density for ρ is π ( ρ ∣ r ) = ν ( ν − 1 ) Γ ( ν − 1 ) 2 π Γ ( ν + 1 2 ) ( 1 − r 2 ) ν − 1 2 ⋅ ( 1 − ρ 2 ) ν − 2 2 ⋅ ( 1 − r ρ ) 1 − 2 ν 2 F ⁡ (...
    58 KB (8,481 words) - 05:18, 2 September 2024
  • Thumbnail for Zernike polynomials
    Function is equivalent to ρ 2 ( ρ 2 − 1 ) d 2 d ρ 2 R n m ( ρ ) = [ n ( n + 2 ) ρ 2 − m 2 ] R n m ( ρ ) + ρ ( 1 − 3 ρ 2 ) d d ρ R n m ( ρ ) . {\displaystyle...
    41 KB (6,210 words) - 06:17, 23 August 2024
  • Thumbnail for Terminal velocity
    mass ρ V {\displaystyle \rho V} , with V {\displaystyle V} the volume of the object. So instead of m {\displaystyle m} use the reduced mass m r = m − ρ V...
    18 KB (2,600 words) - 15:40, 31 May 2024
  • Thumbnail for Navier–Stokes equations
    media: D m D t = ∭ V ( D ρ D t + ρ ( ∇ ⋅ u ) ) d V D ρ D t + ρ ( ∇ ⋅ u ) = ∂ ρ ∂ t + ( ∇ ρ ) ⋅ u + ρ ( ∇ ⋅ u ) = ∂ ρ ∂ t + ∇ ⋅ ( ρ u ) = 0 {\displaystyle...
    97 KB (15,331 words) - 02:55, 29 August 2024
  • Thumbnail for Mach number
    full continuity equation for a general fluid flow is: ∂ ρ ∂ t + ∇ ⋅ ( ρ u ) = 0 ≡ − 1 ρ D ρ D t = ∇ ⋅ u {\displaystyle {\partial \rho \over {\partial...
    23 KB (2,756 words) - 07:07, 20 August 2024
  • Thumbnail for Lorenz system
    attractor, when ρ < 1. A pitchfork bifurcation occurs at ρ = 1, and for ρ > 1 two additional critical points appear at ( β ( ρ − 1 ) , β ( ρ − 1 ) , ρ − 1 ) and...
    37 KB (4,378 words) - 10:55, 16 August 2024
  • Thumbnail for Hydrostatic equilibrium
    {2GM(r)}{rc^{2}}}\right)^{-1}} In practice, Ρ and ρ are related by an equation of state of the form f(Ρ,ρ) = 0, with f specific to makeup of the star...
    27 KB (4,414 words) - 13:15, 23 August 2024
  • Thumbnail for Quantum entanglement
    E.g., there are examples when ρ 1 → ρ 2 {\displaystyle \rho _{1}\to \rho _{2}} is impossible by LOCC, but ρ 1 ⊗ ρ 1 → ρ 2 {\displaystyle \rho _{1}\otimes...
    104 KB (12,755 words) - 12:31, 1 September 2024
  • is J F ( ρ , φ , θ ) = [ ∂ x ∂ ρ ∂ x ∂ φ ∂ x ∂ θ ∂ y ∂ ρ ∂ y ∂ φ ∂ y ∂ θ ∂ z ∂ ρ ∂ z ∂ φ ∂ z ∂ θ ] = [ sin ⁡ φ cos ⁡ θ ρ cos ⁡ φ cos ⁡ θ − ρ sin ⁡ φ sin...
    25 KB (3,593 words) - 19:18, 22 August 2024
  • Thumbnail for Road signs in Greece
    trains Ρ-1 Give way Ρ-2 Stop Ρ-7 No entry Ρ-30 No overtaking (cars) Ρ-30 No overtaking (arrows) Ρ-34 Customs control Ρ-39 No parking Ρ-39 No parking Ρ-41...
    72 KB (4,980 words) - 11:19, 12 July 2024
  • The density of air or atmospheric density, denoted ρ, is the mass per unit volume of Earth's atmosphere. Air density, like air pressure, decreases with...
    17 KB (2,775 words) - 10:37, 11 June 2024
  • E_{n}(z):=(1-z)\prod _{k=1}^{n}e^{z^{k}/k}} Entire functions of finite order ρ {\displaystyle \rho } have Hadamard's canonical representation: f ( z ) =...
    12 KB (2,657 words) - 21:22, 22 January 2024
  • Thumbnail for Diameter
    {\displaystyle S} is the subset and if ρ {\displaystyle \rho } is the metric, the diameter is diam ⁡ ( S ) = sup x , y ∈ S ρ ( x , y ) . {\displaystyle \operatorname...
    8 KB (1,018 words) - 01:03, 31 August 2024
  • Thumbnail for Speed of sound
    (or the modulus of bulk elasticity for gases); ρ {\displaystyle \rho } is the density. K s = ρ ( ∂ P ∂ ρ ) s {\displaystyle K_{s}=\rho \left({\frac {\partial...
    56 KB (7,918 words) - 22:08, 11 July 2024
  • Thumbnail for Centripetal force
    = d 2 ρ d t 2 u ρ + 2 d ρ d t u θ d θ d t − ρ u ρ ( d θ d t ) 2 + ρ u θ d 2 θ d t 2   , = u ρ [ d 2 ρ d t 2 − ρ ( d θ d t ) 2 ] + u θ [ 2 d ρ d t d θ...
    52 KB (7,791 words) - 15:00, 4 July 2024
  • Thumbnail for Vector fields in cylindrical and spherical coordinates
    xy-plane (i.e. ρ) and the positive x-axis (0 ≤ φ < 2π), z is the regular z-coordinate. (ρ, φ, z) is given in Cartesian coordinates by: [ ρ ϕ z ] = [ x 2...
    10 KB (1,624 words) - 19:01, 29 May 2024
  • Thumbnail for Reynolds number
    is defined as: R e = u L ν = ρ u L μ {\displaystyle \mathrm {Re} ={\frac {uL}{\nu }}={\frac {\rho uL}{\mu }}} where: ρ is the density of the fluid (SI...
    50 KB (6,365 words) - 00:14, 27 August 2024
  • Thumbnail for Venturi effect
    volumetric flow: Δ P = 1 2 ρ ( v 2 2 − v 1 2 ) = 1 2 ρ ( ( A 1 A 2 ) 2 − 1 ) v 1 2 = 1 2 ρ ( 1 A 2 2 − 1 A 1 2 ) Q 2 = k ρ Q 2 {\displaystyle \Delta P={\frac...
    17 KB (2,491 words) - 11:31, 29 August 2024
  • Thumbnail for Yule–Simon distribution
    probability mass function (pmf) of the Yule–Simon (ρ) distribution is f ( k ; ρ ) = ρ B ⁡ ( k , ρ + 1 ) , {\displaystyle f(k;\rho )=\rho \operatorname...
    10 KB (1,312 words) - 03:48, 11 June 2023
  • functional derivative, δ T W δ ρ ( r ) = ∂ t W ∂ ρ − ∇ ⋅ ∂ t W ∂ ∇ ρ = − 1 8 ∇ ρ ⋅ ∇ ρ ρ 2 − ( 1 4 ∇ 2 ρ ρ − 1 4 ∇ ρ ⋅ ∇ ρ ρ 2 ) where     ∇ 2 = ∇ ⋅ ∇  ...
    29 KB (5,115 words) - 06:37, 16 May 2024