Question

why charges does not depends on speed?
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Answer 1

Answer:

Mass is not dependent on velocity. Perception of mass by an observer is dependent on difference of velocity, because mass is not a scalar: it is a component of mass+momentum. ... Gravitational effect depends not on mass, but on the invariant mass-energy tensor. Charge, on the other hand, is a scalar.

Explanation:

Answer 2

Answer:

Explanation:

Well for starters, the theory only handles mass in itself, hence "Electrodynamics of Moving Bodies" and not "Moving charges". ... Mass is not dependent on velocity. Perception of mass by an observer is dependent on difference of velocity, because mass is not a scalar: it is a component of mass+momentum.