"भौतिकी के सूत्र" (अनुभाग) सम्पादित करें

== उष्मागतिकी (Thermodynamics) ==
{| class="wikitable"
|-
|[[Zeroth Law of Thermodynamics]]
|<math>(A = B) \land (B=C) \Rightarrow A=C</math><br /><small>(where "=" denotes systems in thermal equilibrium</small>
|-
|[[First Law of Thermodynamics]]
|<math>\Delta E_{int} = Q + W</math>
|-
|[[Second Law of Thermodynamics]]
|<math>\Delta S \ge 0</math>
|-
|[[Third Law of Thermodynamics]]
|<math>S = S_{structural} + CT</math>
|-
|[[temperature]]
|<math>T</math>
|-
|[[molecules]]
|<math>N</math>
|-
|[[degrees of freedom (physics and chemistry)|degrees of freedom]]
|<math>f</math>
|-
|[[heat]]
|<math>Q</math>, <math>\Delta E</math> due to <math>\Delta T</math> <small>(energy)</small>
|-
|[[thermal mass]] ([[extensive property]])
|<math>C_{th} = Q/\Delta T</math>
|-
|[[specific heat capacity]] ([[bulk property]])
|<math>c_{th} = Q/\Delta Tm</math>
|-
|[[enthalpy of vaporization]]
|<math>L_v = Q/m</math>
|-
|[[enthalpy of fusion]]
|<math>L_f = Q/m</math>
|-
|[[thermal conductivity]]
|<math>\kappa</math>
|-
|[[thermal resistance]]
|<math>R=L/ \kappa</math>
|-
|[[thermal conduction]] rate
|<math>P = Q/t = A(T_H - T_C)/R</math>
|-
|[[thermal conduction]] rate through a composite slab
|<math>P = Q/t = A(T_H - T_C)/\Sigma(R_i)</math>
|-
|linear [[coefficient of thermal expansion]]
|<math> dL/dt = \alpha L</math>
|-
|volume [[coefficient of thermal expansion]]
|<math>dV/dt = 3 \alpha V </math>
|-
|[[Boltzmann constant]]
|<math>k</math> <small>(energy)/(temperature)</small>
|-
|[[Stefan-Boltzmann constant]]
|<math>\sigma</math> <small>(power)/(area)(temp)^4</small>
|-
|[[thermal radiation]]
|<math>P = \sigma \epsilon A T ^4_{sys}</math>
|-
|[[thermal absorption]]
|<math>P = \sigma \epsilon A T ^4_{env}</math>
|-
|[[adiabatic]]
|<math>\Delta Q = 0 </math>
|-
|[[ideal gas law]]
|<math>PV = kTN</math>
|-
|work, constant temperature
|<math>W=kTNln(V_f/V_i)</math>
|-
|work due to gas expansion
|<math>W = \int_{i}^{f}pdV</math>
|-
|. . . [[adiabatic]]
|<math>\Delta E_{int} = W</math>
|-
|. . . [[constant volume]]
|<math>\Delta E_{int} = Q</math>
|-
|. . . [[free expansion]]
|<math>\Delta E_{int} = 0</math>
|-
|. . . [[closed cycle]]
|<math>Q + W = 0</math>
|-
|work, constant volume
|<math>W=0</math>
|-
|work, constant pressure
|<math>W=p\Delta V</math>
|-
|[[translational energy]]
|<math>E_{k,avg} = kTf/2</math>
|-
|[[internal energy]]
|<math>E_{int} = NkTf/2</math>
|-
|[[Maxwell-Boltzmann distribution#Typical speeds|mean speed]]
|<math>v_{avg}= \sqrt{(kT/m)(8/\pi)}</math>
|-
|[[Maxwell-Boltzmann distribution#Typical speeds|mode speed]]
|<math>v_{prb} = \sqrt{(kT/m)2}</math>
|-
|[[root mean square speed]]
|<math>v_{rms} = \sqrt{(kT/m)3}</math>
|-
|[[mean free path]]
|<math>\lambda = 1/(\sqrt{2} \pi d^2 N / V)</math>?
|-
|[[Maxwell–Boltzmann distribution]]
|<math>P(v)=4\pi(m/(2\pi kT))^{3/2}V^2e^{-(mv^2/(2kT))}</math>
|-
|molecular [[specific heat]] at a constant volume
|<math>C_V = Q/(N\Delta T)</math>
|-
|?
|<math>\Delta E_{int} = NC_V \Delta T</math>
|-
|molecular [[specific heat]] at a constant pressure
|<math>C_p = Q/(N\Delta T)</math>
|-
|?
|<math>W = p \Delta V = Nk \Delta T</math>
|-
|?
|<math>k = C_p - C_V</math>
|-
|[[adiabatic expansion]]
|<math>pV^{\gamma} = constant</math>
|-
|[[adiabatic expansion]]
|<math>TV^{\gamma - 1} = constant</math>
|-
|[[multiplicity of configurations]]
|<math>W = N!/n_1!n_2!</math>
|-
|[[microstate]] in one half of the box
|<math>n_1, n_2</math>
|-
|[[Boltzmann#Physics|Boltzmann's entropy equation]]
|<math>S = klnW</math>
|-
|[[irreversibility]]
|<math></math>
|-
|[[entropy]]
|<math>S = - k\sum_i P_i \ln P_i \!</math>
|-
|[[entropy]] change
|<math>\Delta S = \int_i^f(1/T)dQ \approx Q/T_{avg}</math>
|-
|[[entropy]] change
|<math>\Delta S = kNln(V_f/V_i) + NC_Vln(T_f/T_i)</math>
|-
|[[entropic force]]
|<math>f = -TdS/dx</math>
|-
|[[engine]] efficiency
|<math>\epsilon = |W|/|Q_H|</math>
|-
|[[Carnot engine]] efficiency
|<math>\epsilon_c = (|Q_H|-|Q_L|)/|Q_H| = (T_H-T_L)/T_H</math>
|-
|[[refrigeration]] performance
|<math>K = |Q_L|/|W|</math>
|-
|[[Carnot refrigeration]] performance
|<math>K_C = |Q_L|/(|Q_H|-|Q_L|) = T_L/(T_H-T_L)</math>
|-
|}