• Thumbnail for Regenerative braking
    distributed by the flywheel is therefore: K E fly = η fly m v 2 2 {\displaystyle KE_{\text{fly}}={\frac {\eta _{\text{fly}}mv^{2}}{2}}} Regenerative braking has...
    56 KB (6,311 words) - 17:36, 21 May 2025
  • as a phrase to warn of the coming of the police (typically "22, v'là les flics !", in English: "5-0! Cops!") In Spanish lottery and bingo, 22 is nicknamed...
    5 KB (618 words) - 01:33, 18 June 2025
  • Thumbnail for Bernoulli's principle
    {\displaystyle {\frac {v^{2}}{2}}+\left({\frac {\gamma }{\gamma -1}}\right){\frac {p}{\rho }}=\left({\frac {\gamma }{\gamma -1}}\right){\frac {p_{0}}{\rho...
    75 KB (10,219 words) - 19:44, 23 May 2025
  • Thumbnail for Range (aeronautics)
    d W d t d R d t = − F V , {\displaystyle {\frac {dW}{dR}}={\frac {\frac {dW}{dt}}{\frac {dR}{dt}}}=-{\frac {F}{V}},} where V {\displaystyle V} is the...
    17 KB (2,768 words) - 07:22, 25 May 2025
  • Thumbnail for Terminal velocity
    terminal velocity is given by V t = 2 m g ρ A C d {\displaystyle V_{t}={\sqrt {\frac {2mg}{\rho AC_{d}}}}} where V t {\displaystyle V_{t}} represents terminal...
    18 KB (2,608 words) - 22:15, 12 June 2025
  • Δ t = s ( t 1 ) − s ( t 0 ) t 1 − t 0 . {\displaystyle {\frac {\Delta s}{\Delta t}}={\frac {s(t_{1})-s(t_{0})}{t_{1}-t_{0}}}.} Here, the Greek letter...
    128 KB (16,223 words) - 22:06, 30 June 2025
  • Thumbnail for Planck units
    2 , {\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}=\left({\frac {F_{\text{P}}l_{\text{P}}^{2}}{m_{\text{P}}^{2}}}\right){\frac {m_{1}m_{2}}{r^{2}}},} can...
    53 KB (5,988 words) - 07:56, 2 July 2025
  • Thumbnail for Bertrand's theorem
    {\displaystyle {\frac {L}{r^{2}}}{\frac {d}{d\theta }}\left({\frac {L}{mr^{2}}}{\frac {dr}{d\theta }}\right)-{\frac {L^{2}}{mr^{3}}}=-{\frac {dV}{dr}}.} This...
    13 KB (2,568 words) - 14:51, 25 May 2025
  • Thumbnail for Velocity-addition formula
    frac {V+c_{m}'}{1+{\frac {Vc_{m}'}{c^{2}}}}}={\frac {V+{\frac {c}{n}}}{1+{\frac {Vc}{nc^{2}}}}}={\frac {c}{n}}{\frac {1+{\frac {nV}{c}}}{1+{\frac {V}{nc}}}}\\&={\frac...
    61 KB (11,196 words) - 00:52, 18 June 2025
  • Thumbnail for Mach number
    physicist and philosopher Ernst Mach. M = u c , {\displaystyle \mathrm {M} ={\frac {u}{c}},} where: M is the local Mach number, u is the local flow velocity...
    19 KB (2,205 words) - 05:35, 12 June 2025
  • {\displaystyle {\frac {1}{2}}mv^{2}=k{\frac {q_{\text{a}}q_{\text{g}}}{r_{\text{min}}}}} where k = 1 4 π ϵ 0 {\displaystyle k={\frac {1}{4\pi \epsilon...
    70 KB (9,870 words) - 14:42, 9 June 2025
  • Thumbnail for Naval aircrewman
    split off into their own pipeline from there. Going to A-School (13 weeks), FRAC(about 1 year long), SERE (2 weeks). AWRs perform the same jobs as regular...
    17 KB (2,249 words) - 23:27, 17 April 2025
  • }={\frac {t_{a}-{\frac {vx_{a}}{c^{2}}}}{\sqrt {1-{\frac {v^{2}}{c^{2}}}}}},\ t_{b}^{\prime }={\frac {t_{b}-{\frac {vx_{b}}{c^{2}}}}{\sqrt {1-{\frac {v^{2}}{c^{2}}}}}}}...
    53 KB (6,730 words) - 21:58, 19 June 2025
  • Thumbnail for Flywheel
    Flywheel (redirect from Fly-wheel)
    stored by the flywheel's rotor can be calculated by 1 2 I ω 2 {\textstyle {\frac {1}{2}}I\omega ^{2}} . ω is the angular velocity, and I {\displaystyle I}...
    19 KB (2,532 words) - 21:20, 7 April 2025
  • Thumbnail for Second law of thermodynamics
    dS={\frac {1}{T}}\sum _{j}E_{j}dP_{j}={\frac {1}{T}}\sum _{j}d\left(E_{j}P_{j}\right)-{\frac {1}{T}}\sum _{j}P_{j}dE_{j}={\frac {dE+\delta W}{T}}={\frac {\delta...
    107 KB (15,472 words) - 03:38, 30 June 2025
  • }={\frac {\mu _{0}q^{2}}{6\pi mc}}\left[{\frac {d^{2}p_{\mu }}{d\tau ^{2}}}-{\frac {p_{\mu }}{m^{2}c^{2}}}\left({\frac {dp_{\nu }}{d\tau }}{\frac {dp^{\nu...
    39 KB (5,497 words) - 18:43, 23 May 2025
  • Thumbnail for Frenet–Serret formulas
    {\displaystyle {\begin{aligned}{\frac {\mathrm {d} \mathbf {T} }{\mathrm {d} s}}&=\kappa \mathbf {N} ,\\[4pt]{\frac {\mathrm {d} \mathbf {N} }{\mathrm...
    35 KB (5,011 words) - 18:51, 29 May 2025
  • Thumbnail for Paschen's law
    ln ⁡ ( 1 + 1 γ se ) ] {\displaystyle V_{\text{B}}={\frac {Bpd}{\ln(Apd)-\ln \left[\ln \left(1+{\frac {1}{\gamma _{\text{se}}}}\right)\right]}}} where V...
    22 KB (2,788 words) - 19:01, 25 May 2025
  • x ) 2 = 1 2 m i u 0 2 − e φ ( x ) {\displaystyle {\frac {1}{2}}m_{\mathrm {i} }\,u(x)^{2}={\frac {1}{2}}m_{\mathrm {i} }\,u_{0}^{2}-e\,\varphi (x)} ...
    12 KB (2,133 words) - 23:29, 24 May 2025
  • Q={\begin{pmatrix}-1&{\frac {1}{2}}&&{\frac {1}{2}}\\{\frac {1}{4}}&-1&{\frac {1}{4}}&&{\frac {1}{4}}&&&{\frac {1}{4}}\\&{\frac {1}{2}}&-1&&&{\frac {1}{2}}\\{\frac {1}{3}}&&&-1&{\frac...
    23 KB (4,240 words) - 02:41, 27 June 2025
  • Thumbnail for Orbit
    {\begin{aligned}{\frac {\delta r}{\delta \theta }}&=-{\frac {1}{u^{2}}}{\frac {\delta u}{\delta \theta }}=-{\frac {h}{m}}{\frac {\delta u}{\delta \theta }}\\{\frac {\delta...
    57 KB (8,121 words) - 09:18, 29 June 2025
  • {\displaystyle \left({\frac {T}{W}}\right)_{\text{cruise}}=\left({\frac {D}{L}}\right)_{\text{cruise}}={\frac {1}{\left({\frac {L}{D}}\right)_{\text{cruise}}}}...
    25 KB (1,822 words) - 19:10, 28 June 2025
  • 7000{\text{ forager bees}}\times {\frac {10{\text{ trips in good flying weather}}}{\text{ per day}}}\times {\frac {70{\text{ mg of nectar during honey...
    3 KB (460 words) - 07:45, 11 February 2022
  • the ball to fly farther. The skin friction coefficient is defined as: c f = τ w 1 2 ρ ∞ v ∞ 2 {\displaystyle c_{f}={\frac {\tau _{w}}{{\frac {1}{2}}\rho...
    14 KB (1,881 words) - 01:12, 20 June 2025
  • Thumbnail for Magnetic levitation
    {\displaystyle F_{x}={\frac {B_{r}V_{m}I}{2\pi }}{\frac {\partial }{\partial x}}\left({\frac {x-\Delta x_{0}}{(x-\Delta x_{0})^{2}+d^{2}}}+{\frac {x+\Delta x_{0}}{(x+\Delta...
    65 KB (9,739 words) - 16:24, 5 June 2025
  • {\displaystyle {\begin{aligned}\mu _{i}^{(l)}&={\frac {1}{B}}\sum _{b=1}^{B}x_{(b),i}^{(l)}\\(\sigma _{i}^{(l)})^{2}&={\frac {1}{B}}\sum _{b=1}^{B}(x_{(b),i}^{(l)}-\mu...
    35 KB (5,361 words) - 05:48, 19 June 2025
  • ρ A C D 2 m v 2 = d v d t . {\displaystyle {\frac {1}{m}}\sum F(v)-{\frac {\rho AC_{D}}{2m}}v^{2}={\frac {dv}{dt}}.\,} For a potato-shaped object of average...
    40 KB (5,753 words) - 04:23, 20 May 2025
  • Thumbnail for Aircraft flight dynamics
    {\displaystyle {\frac {{\frac {L_{p}}{A}}{\frac {N_{r}}{C}}-{\frac {N_{p}}{C}}{\frac {L_{r}}{A}}}{{\frac {N_{p}}{C}}{\frac {E}{A}}-{\frac {L_{p}}{A}}}}}...
    49 KB (8,502 words) - 12:49, 28 May 2025
  • + z + 1 z 2 . {\displaystyle H(z)={\frac {1}{3}}+{\frac {1}{3}}z^{-1}+{\frac {1}{3}}z^{-2}={\frac {1}{3}}{\frac {z^{2}+z+1}{z^{2}}}.} The next figure...
    18 KB (3,089 words) - 12:26, 18 August 2024
  • Thumbnail for Single-stage-to-orbit
    {\displaystyle \zeta ={\frac {m_{p}}{m_{i}}}={\frac {m_{i}-m_{f}}{m_{i}}}=1-{\frac {m_{f}}{m_{i}}}=1-{\frac {1}{MR}}={\frac {MR-1}{MR}}} The structural...
    48 KB (5,649 words) - 22:48, 23 May 2025