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Absolute-units
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Can a half life be given in electron volts?
January 9th, 2020
units
radioactivity
absolute-units
half-life
nuclear-physics
How can Planck units be consistent with conflicting dimensions of mass?
January 31st, 2020
physical-constants
quantum-gravity
units
dimensional-analysis
absolute-units
Is the Bohr radius deprecated?
June 21st, 2020
physical-constants
atomic-physics
quantum-mechanics
absolute-units
hydrogen
Why is the action dimensionless in natural units?
December 20th, 2020
dimensional-analysis
action
units
absolute-units
What exactly are we doing when we set $c=1$?
August 24th, 2020
units
speed-of-light
dimensional-analysis
absolute-units
How to get Planck length
January 5th, 2020
physical-constants
black-holes
quantum-gravity
dimensional-analysis
absolute-units
What is the decay width and why is it given in energy units?
May 3rd, 2021
heisenberg-uncertainty-principle
standard-model
particle-physics
absolute-units
radioactivity
Why do universal constants have the values they do?
July 20th, 2020
anthropic-principle
units
physical-constants
absolute-units
Dimension of an angle
August 1st, 2022
si-units
absolute-units
units
dimensional-analysis
Why is the Fermi coupling constant always expressed in units of $(\hbar c)^3$?
August 1st, 2022
si-units
weak-interaction
dimensional-analysis
absolute-units
physical-constants
A question about natural/geometrized units
August 1st, 2022
unit-conversion
si-units
dimensional-analysis
absolute-units
What Planck units are limits?
February 19th, 2020
quantum-mechanics
physical-constants
absolute-units
Heat transfer calculated from the specific heat formula, converting to Kelvin
August 25th, 2020
homework-and-exercises
thermodynamics
absolute-units
Why aren't Faraday's law of induction and Maxwell-Ampere's law (without sources) symmetric?
November 10th, 2020
duality
absolute-units
electromagnetism
maxwell-equations
si-units
How can geometrized units have more than one constant equal to 1?
March 27th, 2021
dimensional-analysis
absolute-units
general-relativity
units
What is the significance of Planck charge?
August 1st, 2021
physical-constants
units
quantum-gravity
absolute-units
charge
What is the meaning for the unit kilogram-mole?
March 28th, 2020
absolute-units
units
physical-chemistry
si-units
Homework: Feynman diagram loops, confusion about natural units
May 12th, 2020
absolute-units
feynman-diagrams
quantum-field-theory
homework-and-exercises
When can two quantities be added together?
July 29th, 2020
absolute-units
units
dimensional-analysis
covariance
What happens as you approach/cross the Planck temperature?
August 1st, 2022
physical-constants
thermodynamics
temperature
quantum-gravity
absolute-units
What is the opposite of the Planck length?
August 1st, 2022
absolute-units
physical-constants
units
cosmology
universe
Why didn't we replace our SI units with a better system?
May 15th, 2020
absolute-units
physical-constants
si-units
units
history
How to express an energy in natural units
June 4th, 2020
dimensional-analysis
units
unit-conversion
absolute-units
Can entropy be equal to zero?
August 1st, 2022
absolute-units
entropy
thermodynamics
Natural unit conversion
July 26th, 2022
absolute-units
dimensional-analysis