Categories
Tags
Units
New post in Units
Is speed of light and sound rational or irrational in nature?
January 23rd, 2020
speed-of-light
physical-constants
mathematics
dimensional-analysis
units
Is it mathematically wrong to use units instead of words/parameters/names in equations?
July 30th, 2020
forces
dimensional-analysis
units
How to indicate that a unit is dimensionless
October 26th, 2020
units
notation
dimensional-analysis
conventions
How to derive $E=mc^{2}$?
June 15th, 2020
special-relativity
units
mass-energy
Why is the length of the Kelvin unit of temperature equal to that of the Celsius unit?
June 10th, 2020
temperature
si-units
units
definition
thermodynamics
What exactly are we doing when we set $c=1$?
August 24th, 2020
speed-of-light
units
dimensional-analysis
absolute-units
What is the unit (dimension) of the 3-dimensional position space wavefunction $\Psi$ of an electron?
February 17th, 2021
units
probability
dimensional-analysis
quantum-mechanics
wavefunction
units and nature
July 26th, 2020
dimensional-analysis
units
What examples are there of unrelated physical quantities measured in the same units?
February 24th, 2021
dimensional-analysis
units
Units of a discrete Fourier transform
July 7th, 2020
units
fourier-transform
dimensional-analysis
discrete
Do bras and kets have dimensions?
February 10th, 2021
quantum-mechanics
wavefunction
units
conventions
dimensional-analysis
Does the magnitude of a physical quantity have units or is it just a plain number?
August 16th, 2020
vectors
units
Why does a calculation to count objects covering a certain area seem to give nonsensical units?
September 14th, 2020
dimensional-analysis
units
estimation
Simple Harmonic Motion - What are the units for $\omega_0$?
April 28th, 2020
rotation
units
dimensional-analysis
harmonic-oscillator
How does the Fourier Transform invert units?
June 19th, 2020
fourier-transform
dimensional-analysis
units
Proper reference for the International System of Units
April 23rd, 2020
metrology
si-units
units
resource-recommendations
Units don't match in the torsional spring energy!
March 22nd, 2020
units
Why are work and energy considered different in physics when the units are the same?
January 10th, 2020
units
newtonian-mechanics
dimensional-analysis
work
energy
Why is the absolute zero a rational number in Celcius?
September 11th, 2020
metrology
water
temperature
units
definition
273 + degree Celsius = Kelvin. Why 273?
March 10th, 2021
metrology
definition
units
temperature
water
Does the unit of a quantity change if you take square root of it?
April 16th, 2021
dimensional-analysis
units
What is a base unit in the new SI, and why is the ampere one of them?
April 19th, 2020
metrology
units
conventions
si-units
Are the units of energy the same in higher dimensions?
October 13th, 2020
units
spacetime-dimensions
mass-energy
dimensional-analysis
homework-and-exercises
Fundamental question about dimensional analysis
November 1st, 2020
dimensional-analysis
units
What are the units or dimensions of the Dirac delta function?
October 11th, 2020
units
dimensional-analysis
dirac-delta-distributions
electrostatics
Why was carbon-12 chosen for the atomic mass unit?
August 14th, 2020
metrology
history
definition
units
conventions
Why is there a factor of $4\pi$ in certain force equations?
May 31st, 2020
units
electrostatics
coulombs-law
Why isn't it $E \approx 27.642 \times mc^2$?
March 12th, 2021
metrology
units
dimensional-analysis
physical-constants
Why isn't temperature measured in joules per mole (J/mol)?
August 1st, 2022
units
temperature
thermodynamics
Square bracket notation for dimensions and units: usage and conventions
March 31st, 2020
dimensional-analysis
notation
conventions
units
←
1
2
3
4
5
6
7
8
9
…
14
15
→