Recent content by spica

The sense of an absolute quantity doesn't mean it's invariant automaticaly for any observer. The absolute means the thing is a real only, but the real things are not invariant, in the relativistic sense at least! What is invariant in the reality? Nothing is invariant, maybe a pure numbers only...

I know from the school and other, more advanced literature, the acceleration is the real quantity, probably because it's a second derivative. And if the relativistic mass is outdatet, then why it's still used in the relativity? For example: p = gamma mv, what is this? further: F-relativistic...

I can use a reversed version of the relativistic rocket, using the g = const in the absolute sense. In general: for an absolute acceleration a, the acceleration measured in the rocket is: a' = a x gamma^3, thus the standard work-energy equation is now: ##dE = Fdx = m a\gamma^3dx## but: ##a =...

What a hand-waving? It's rather obvious, that an absolute acceleration of the rocket should be equal to: g / gamma^3, to keep a constant 'gravity' inside the rocket. [m/s^2] the length contraction: +1, and dilation of time: +2 = 3. But it's strange somewhat for me, because there is nothing...

A simple problem with a constant acceleration, ignoring mass of the fuel. The velocity of a rocket, which moves withe a constant acceleration g, is equal: v(t) = gt but I want to keep the const acceleration inside the rocket, not in the absolute sense. An acceleration has a dimension: L/T^2...