For Einstein's equation $E= mc^2$ is it energy that increases or mass as the velocity increases?
29290
Why is there a controversy on whether mass increases with speed?
155640
Why is the laboratory frame energy always greater than the center of mass frame energy?
760
Can the velocity of the center of mass of two spheres change after a collision?
59594
Binding energy and mass
149674
Kinetic energy of a photon and Schwarzschild radius
89301
Is the total energy of the universe constant?
54020
Does a moving object curve space-time as its velocity increases?
109795
Layman's explanation and understanding of Einstein's field equations
78717
Does velocity or acceleration cause time dilation?
107902
Is Kinetic Energy stored as (rest) mass?
8077
Photons in expanding space: how is energy conserved?
144274
Why mass & energy bend spacetime?
22205
What is the weight equation through general relativity?
79068
Is energy conserved in general relativity? Does $\nabla_aT^{ab}_{\rm matter}=0$ represent the conservation of energy and momentum?
114225
If movement is relative, why is it said that moving objects have kinetic energy?
137250
What happens to the rotational kinetic energy?
3909
Does $E = mc^2$ apply to photons?