Categories
Tags
Approximations
New post in Approximations
Does Kirchhoff's Law always hold?
December 11th, 2020
electric-current
electric-circuits
electromagnetism
approximations
voltage
Special Relativistic approximation to GR
December 17th, 2020
gps
general-relativity
relativity
approximations
special-relativity
What is the point of a voltage divider if you can't drive anything with it?
July 26th, 2020
electrical-resistance
electric-current
electric-circuits
approximations
voltage
Is there an approximation for the Lorentz factor for very large velocities?
August 1st, 2022
lorentz-symmetry
speed-of-light
special-relativity
approximations
velocity
Do we take gravity = 9.8 m/s² for all heights when solving problems? Why or why not?
August 1st, 2022
newtonian-gravity
physical-constants
approximations
How to justify RPA (random phase approximation)?
July 21st, 2020
perturbation-theory
condensed-matter
quantum-field-theory
approximations
feynman-diagrams
If charges is quantised, how can we use integrals in electrostatics?
August 1st, 2022
discrete
approximations
integration
charge
electric-current
Why is that in the action principle, the Taylor's series is limited to the first order?
August 29th, 2020
variational-principle
differentiation
lagrangian-formalism
variational-calculus
approximations
What will be the equation of motion of driven pendulum for amplitudes beyond the small angle approximation?
August 27th, 2020
harmonic-oscillator
newtonian-mechanics
approximations
What scale are Maxwell's Equations valid?
August 1st, 2022
quantum-mechanics
electromagnetism
quantum-electrodynamics
maxwell-equations
approximations
Should not we apply pseudo-forces all the time as the Earth is a non-inertial frame of reference?
August 30th, 2021
reference-frames
approximations
estimation
acceleration
newtonian-mechanics
Why do we ignore the second-order terms in the following expansion?
August 1st, 2022
linearized-theory
oscillators
calculus
approximations
classical-mechanics
Accuracy of physics laws
April 2nd, 2021
laws-of-physics
models
approximations
error-analysis
newtonian-mechanics
Why do we still use perturbation theory, when we have advanced numerical methods and fast computers?
August 1st, 2022
perturbation-theory
computational-physics
simulations
approximations
If the solar system is a non-inertial frame, why can Newton's Laws predict motion?
August 1st, 2022
newtonian-mechanics
reference-frames
inertial-frames
approximations
solar-system
When is the adiabatic approximation for solid state systems valid?
August 25th, 2020
approximations
adiabatic
solid-state-physics
Why is the Newtonian expression for kinetic energy called the "first order" approximation of the relativistic expression?
May 16th, 2020
conventions
terminology
classical-mechanics
special-relativity
approximations
Near Earth vs Newtonian gravitational potential
August 1st, 2022
approximations
newtonian-gravity
potential-energy
earth
conventions
Can Hooke's law be derived?
November 25th, 2021
solid-state-physics
spring
elasticity
approximations
Why is a particle non-relativistic when its kinetic energy is small compared to its rest energy?
February 11th, 2020
special-relativity
energy
speed-of-light
speed
approximations
Why don't the Navier-Stokes equations simplified for hydrodynamics contain gravitational acceleration?
May 19th, 2020
navier-stokes
fluid-dynamics
newtonian-gravity
dimensional-analysis
approximations
What is the true nature of gravity?
August 1st, 2022
approximations
quantum-gravity
newtonian-gravity
gravity
general-relativity
The reasoning behind doing series expansions and approximating functions in physics
January 3rd, 2020
approximations
mathematics
Understanding this quote by Feynman
March 10th, 2022
approximations
models
laws-of-physics
Are laws of nature absolute or are they just very good approximations?
April 15th, 2020
newtonian-mechanics
approximations
models
How is it possible to differentiate or integrate with respect to discrete time or space?
October 20th, 2020
spacetime
calculus
lattice-model
discrete
approximations
Validity of mean-field approximation
September 2nd, 2021
approximations
mean-field-theory
condensed-matter
superconductivity
many-body
What does Feynman mean when he says that $F=ma$ is not exact?
December 12th, 2021
newtonian-mechanics
forces
definition
approximations
Why do physicists say that elementary particles are point particles?
May 13th, 2020
quantum-field-theory
particle-physics
point-particles
elementary-particles
approximations
Is $\pi^2 \approx g$ a coincidence?
August 1st, 2022
physical-constants
dimensional-analysis
history
si-units
approximations
←
1
2
3
4
→