How can I explain what a kilogram is using Planck's constant?
12430
What are the proposed realizations in the New SI for the kilogram, ampere, kelvin and mole?
38720
Is it possible to speak about changes in a physical constant which is not dimensionless?
72129
Finding the correct units for the energy-momentum tensor?
131166
Kinetic energy as $\pi k_B T$
35464
Why do universal constants have the values they do?
103693
How to apply the WKB approximation in this case?
107446
How to measure the mass of the electron?
83770
Kinetic energy doesn't make sense
64935
Using photons to explain electrostatic force
79811
How is the energy loss by an accelerating charge expressed in the equations of motion?
84892
What truly is mass, and is there a direct way to measure it?
56761
How do you convert between different units of particle flux?
137061
Understanding the different kinds of mass in gravity
33126
Why does the Boltzmann factor $e^{-E/kT}$ seem to imply that lower energies are more likely?
13319
Recognize physical constants?
46149
Units of a log of a physical quantity
112264
Cosmological constant doubts