Schrödinger's Cat Part 2
You don't have to know too much about the switch, except that after you flip it on, you have set off a chain of events that will eventually release poison gas inside the box with the cat in it. It is a quantum switch because it has this property: It is impossible to know, due to the nature of reality itself, the exact time T that the poison will be released. You can only know the probability that at some time T, the gas will be released.
How is this possible? Can such a switch be made? Yes, because you can have a quantum event as part of the chain of events, and quantum events obey laws of probability. I accept this verdict of Quantum Theory, that there are no "hidden" factors or variables that will let us determine the exact time T, and we will proceed from there.
Proving the Relativistic Energy-Momentum relation, the hard way and the easier way.
This adds the proof for the relativistic mass effects from motion, proving that gravity causes it.