Energy (in Joules) equals the mass (in Kgs) multiplied by the square of speed of light (in meters per second)
The only thing that travels at the speed of light, is light. Light is also said to have no mass, therefore the only way for something to travel at the speed of light is for it to have no mass.
Anything that has any mass when it's at rest would have infinite mass at the speed of light.
No, a mass cannot travel at the speed of light according to Einstein's theory of relativity, as its mass would become infinite which is not physically possible. Photons are particles of light that always travel at the speed of light and have zero rest mass.
Neither, mass can never reach the speed of light, this question also contridicts the theory of realativity.
Light does not have mass. Remember, as an object's speed approaches the speed of light, its mass approaches infinity, therefore it will require infinite energy to accelerate something to the speed of light, therefore only massless particles can travel at light speed.
Mass= mass of electron Speed= Almost equal to that of light
No. Nothing with mass can travel at the speed of light.
The speed of light is roughly 300,000 kilometers per second. You'll have to get your own mass.
As far as is known nothing with mass can travel at the speed of light. There are 'things' that exceed light speed, such as wave guides, but mass or information cannot do so.
Because light has no mass.
When any object with mass moves, no matter at what speed, its mass increases. The faster it moves, the faster its mass increases. And the closer to the speed of light it moves, the closer to infinity its mass grows.
That's related to the fact that it moves at the speed of light. If you look at the formula for mass increase as a function of speed, it should be obvious that the mass of anything that has a non-zero (i.e., positive) rest mass would approach infinity as the object approaches the speed of light - meaning that the speed of light itself can never be reached, since that would give the object an infinite mass (and require an infinite energy). The only way an object can move at the speed of light is for it to have a rest mass zero. In a way, this is hypothetical, since particles such as the photon or graviton, that move at the speed of light, can only move at the speed of light.