Derivation of rocket equation
93539
Why is $M\frac{dv}{dt} = v_{rel} .\frac{dm}{dt}$ correct and $(M - dm)\frac{dv}{dt} = v_{rel} .\frac{dm}{dt}$ wrong?
80886
Equation of everything
49073
how to obtain solution for $u_t+u=u_{xx}$
119270
Finding equation using hyperbolic transcendental functions.
40805
Solve $u_t=u_{xx}+u_x$
12422
Derivation of $E=pc$ for a massless particle?
70477
Asking the vector form of the equation about velocity
54857
The wave equation in general relativity, special relativity, and Cartesian coordinates
26439
The problem of instant velocity
104171
Geometric derivation of wave equation
97780
Deriving Newton's Third Law from homogeneity of Space
37598
Deriving the Lorentz force from velocity dependent potential
52785
Definition respective derivation of angular momentum formula
130166
Equivalece of the geodesic equation and the continuity equation for the energy-momentum tensor
65039
What is the reason of $dT/dh = 0$ in the gas column?
28935
Lagrangian of the Euler equations
121547
Differential equation for Harmonic Motion