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When is an object at rest?
September 29th, 2022
definition
velocity
reference-frames
What is the definition of an exchange particle?
June 5th, 2020
carrier-particles
definition
particle-physics
What is the difference between electric potential and electric potential energy?
May 25th, 2020
potential
definition
potential-energy
electrostatics
What is the meaning of inclination $1$ in $x$?
September 3rd, 2020
terminology
kinematics
geometry
definition
Intuition on the GNS construction and how it relates to usual quantum mechanics
August 1st, 2022
mathematical-physics
quantum-mechanics
definition
hilbert-space
operators
What is charge actually? How to define it?
August 1st, 2022
electromagnetism
electrostatics
charge
definition
Definition of a year
August 1st, 2022
time
terminology
metrology
definition
Newton's first law: is his concept of (force of ) inertia still useful and used?
August 1st, 2022
newtonian-mechanics
terminology
history
definition
inertia
What is momentum?
August 1st, 2022
definition
velocity
mass
momentum
newtonian-mechanics
Generalized divergence of tensor in GR
October 2nd, 2020
differentiation
definition
tensor-calculus
differential-geometry
general-relativity
Will centre of gravity coincide with centre of mass if density of object is non-uniform?
January 30th, 2020
definition
mass
newtonian-gravity
newtonian-mechanics
What is the relation between ‘Electric Potential’ and ‘Electric Potential Energy’?
February 15th, 2020
electrostatics
charge
definition
potential-energy
potential
What exactly is $F$ in $W = \int_{a}^{b} F dx$?
August 1st, 2022
newtonian-mechanics
forces
definition
work
What is the definition of soliton?
October 1st, 2020
field-theory
definition
solitons
What is the difference between electric potential, potential difference, and voltage?
August 1st, 2022
potential
voltage
definition
KMS States and Thermal States
May 4th, 2020
quantum-mechanics
quantum-field-theory
thermodynamics
statistical-mechanics
definition
Number of supersymmetric charge and the meaning of $\cal N$
August 1st, 2022
spacetime-dimensions
supersymmetry
definition
Difference between spin-orbit coupling and $LS$ coupling (Russell-Saunders)
August 1st, 2022
quantum-mechanics
quantum-spin
definition
atomic-physics
angular-momentum
What is meant by coordinate time? Isn't it time measured on a clock? If not then what does it measure?
March 6th, 2021
definition
time
coordinate-systems
general-relativity
observers
Difference between torque and moment
October 8th, 2020
newtonian-mechanics
rotational-dynamics
definition
torque
moment
What does the 'displacement' refer to in the definition of work?
August 1st, 2022
displacement
definition
work
forces
newtonian-mechanics
What is basically the difference between static pressure and dynamic pressure?
June 26th, 2020
fluid-dynamics
bernoulli-equation
definition
terminology
pressure
The elusive difference between force and impulse
October 8th, 2020
conservation-laws
momentum
forces
definition
Define Pressure at A point. Why is it a Scalar?
August 1st, 2022
definition
pressure
fluid-dynamics
forces
How is focal length defined for a two-lens system, separated by a distance $d$?
July 10th, 2020
optics
definition
geometric-optics
lenses
What is the difference between kinetic momentum $p=mv$ and canonical momentum?
January 21st, 2021
classical-mechanics
definition
field-theory
momentum
lagrangian-formalism
When we talk about the Higgs mechanism, is it a quantum effect?
March 29th, 2021
symmetry-breaking
higgs
definition
terminology
quantum-field-theory
Is the Lagrangian density a functional or a function?
January 17th, 2020
variational-calculus
definition
field-theory
lagrangian-formalism
What is a photon?
August 19th, 2020
definition
photons
What is displacement? Position relative to a reference point or change of position
August 1st, 2022
displacement
definition
velocity
kinematics
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