FANDOM


Seebeck effectEdit

  • Same as Thermocouple.
  • Use in thermoelectric generator.
  • When joint of different metal gains heat generates electricity.

流体力学Edit

  • Force

\rho_{1} u_{1} A_{1} [N] = \rho_{2} u_{2} A_{2} [N]

    • \rho_{1}[kg/m^3], u_{1}[m/s], A_{1}[m^2]: Input value
    • \rho_{2}[kg/m^3], u_{2}[m/s], A_{2}[m^2]: Output value
    • if volume won't change

u_{1} A_{1} = u_{2} A_{2} (\rho_{1} = \rho_{2})

  • Momentum change

\rho_{2} [kg/m^3] A_{2} [m^2] u_{2} [m/s] ^2  - \rho_{1} [kg/m^3] A_{1} [m^2] u_{1} [m/s]^2 = p_{1} [Pa] A_{1} [m^2] - p_{2} [Pa] A_{2} [m^2] + F[N]

  • レイノルズ数
    • 小さい: 層流
    • 大きい: 乱流
    • 遷移点: 層流から乱流に変化する点
    • 双子渦
    • カルマン渦
  • ナビエ・ストークス方程式
  • 流体要素
  • 流線
    • 接線が速度ベクトルの向き
  • 流跡線
    • 流体要素が移動した軌跡
  • 流脈線
    • ある点を通る流体要素が描く線
  • 粘性
    • 完全流体:粘性の無い流体
    • 境界層:表面周りの粘性の及ぶ範囲
    • 粘性係数・粘度:kg/(m*s)=Pa
    • 流体の圧縮性によって生じる現象:音波
    • 新幹線のカモノハシ型は,音波の抑制のため
  • マッハ数:流速÷音速
    • コンコルドは約㍅2

コンデンサEdit

  • クーロン定数 k_{0} = 9.0 \times 10^9 [N m^2 / C^2])
  • Q,q: 電気量 [C], [A*s]
  • E: 電場の強さ[N/C], [V/m]
  • V: 電位差 [V]
  • C: 電気容量 [F]
  • ε: 誘電率 [F/m] (=8.85 * 10^-12 [F/m])
  • ε0: 比誘電率
  • クーロン力:F = k0 * q1 * q2 / r^2 [N]
  • E = k0 * Q / r^2
  • V = k0 * Q / r
  • W = q * V
  • F = q * E
  • N = 4π * k0 * Q = Q / ε0
  • W = Q* V / 2 = C * V^2 / 2 = Q^2 /2C
  • V = E * d
  • C0 = ε0 * S / d = S / (d * 4π * k0)
  • C = ε * S / d = εr * C0
  • εr = ε / ε0
  • ε0 = 1 / (4π * k0)
  • 極板間引力: F = Q * E / 2
  • Q = C*V

合成容量 Edit

  • 並列:  C = {\sum C_{k}}
  • 直列: {1 \over C} = {\sum {1 \over C_{k}}}

温度特性Edit

温度による容量の変化の誤差 これを逆手に取って,一定の温度変化による特性の変化が一定の電子部品は温度センサーに使える

周波数特性Edit

高周波での安定性 漏電量は\tan \deltaでわかる

合成抵抗Edit

  • 並列: {1 \over C} = {\sum {1 \over C_{k}}}
  • 直列:  C = {\sum C_{k}}

耐圧Edit

かけられる電圧の上限の目安

ボルツマン定数Edit

k [J / K] = R / N_{A} = 1.380658 \times 10^23

  • N: Avogadro数
  • R: 気体定数

質量の持つエネルギーEdit

e[J] = {m[kg] c[m/s]^2 \over \sqrt{1 - {v[m/s]^2 /\over c[m/s]^2}}}

c: Speed of light

等加速度運動Edit

v[m/s] = v_{0}[m/s] + a[m^2/2] t[s]

x[m] = v_{0}[m/s] t[s] + {1 \over 2}a[m^2/2] t^2

v[m]^2 - v_{0}[m]^2 = 2 a[m^2/s] x[m]

万有引力Edit

  • Newton

F[N] = G[{N m^2 \over kg^2}] {M[kg] m[kg] \over r[m]^2}

G = 6.673 * 10^-11

熱力学Edit

d{ ln W (E) \over d E} = {1 \over kT}

{mv^2 \over 2} = {3\over 2}kT

同位体解析Edit

  • _{14} C
  • _{129} I

Four dynamicsEdit

  • Fluid dynamics
  • Thermodynamics
  • Strength of materials
  • Mechanical dynamics

Gas lawEdit

  • Ideal gas
    • p [Pa]
    • V [L]
    • n [mol]
    • T [K]
    • R [J/(K*mol)]

pV = nRT

WaveEdit

v = f \lambda = {\lambda \over T}

f = {1 \over T}

n_{1,2} = {\sin \theta_{1} \over \sin \theta_{2}} = {v_{1} \over v_{2}} = {\lambda_{1} \over \lambda_{2}} = {n_{1} \over n_{2}}

y = A \sin({2\pi \over T}(t - {x \over v})) = A \sin 2\pi({t \over T} - {x \over \lambda})

Fluid DynamicsEdit

  • Mach
    • The speed of wave in trasmission medium.

c = \sqrt{\gamma R T} = \sqrt{\gamma p \over \rho}

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.