Light!
Coherently focussed light can burn through things like steel and acrylic and people.
And, depending on how you go about weighing it, light doesn't have any weight.
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Light!
Coherently focussed light can burn through things like steel and acrylic and people.
And, depending on how you go about weighing it, light doesn't have any weight.
I considered that one:
To weight light, you need to stop it first... in that case the mass goes up to infinite thanks to Lorentz Force
F = q(E+v*B)