Total energy is the mass times the square of the maximum distance a particle can travel in a unit of time.

Electromagnetic waves are physically associated with photons. But the photon is not the only particle

Speed of light - the speed of propagation of electromagnetic waves or electromagnetic radiation

Radiation is the transfer of energy in the form of waves or particles

Does it follow from this that electromagnetic radiation is the transfer of energy in the form of electromagnetic waves or electromagnetic particles?

From the point of view of the wording, everything is correct. From the point of view of measurements - a photon can lose energy, its speed can change depending on the environment, etc.

Those. if you tie the energy to the actual speed of the photon, the calculations will not be accurate. Because then it turns out that the total energy of the object will change depending on how fast the photon is moving.

If we consider the speed of light as the limiting speed of any particles in principle (without reference to photons), then we get a stable figure.

That is, energy = is mass multiplied by the speed of propagation of electromagnetic waves or the transfer of energy in the form of electromagnetic waves or electromagnetic particles squared

what ???!

Energy = mass times energy transfer squared

what???

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