Recent content by MidiMagic

"OK, then the old Twin's paradox is solved: reunited in the middle of the two observers, the two clocks should show the same time, which would contradict the light clock predictions." Not so fast. 1. When something is accelerated from one frame of reference to another, clocks that were in...

Here is a thought experiment to show that it is relativity and the properties of spacetime, not something affecting the mechanism of the clock. Case 1 is the case the original post posited: One clock is put into a vehicle moving relative to you at a constant velocity. You and an identical clock...

I know the origin of the idea that hot water freezes faster than cold water. It was a misprint in a list of hints in a syndicated household hints column in newspapers. The original tip was "For faster ice, use cold water. For clearer ice, use hot water." When it was put on the wire service...

There is one purpose for the grounding system and another purpose for the bonding system. The equipment ground is there to cause the overcurrent device to trip. It does trip, but it takes time for this to happen. During this brief time, the equipment ground of part of the system is not at...

The center of the universe is back in time at the big bang. Everything in the universe today is at the edge of the expanding universe.

The Earth is not an inertial reference frame. It is a constantly accelerating reference frame: As the Earth orbits the sun it is constantly accelerated toward the sun by the centripetal pull of gravity by the sun, causing it to follow the path of its orbit. In addition, any reference point on...

The equipment grounding conductors (safety grounds) must bond everything metal together and to the Earth ground and the neutral, but they must also be connected so that current does not normally flow through them. The current flowing though them in the event of a ground fault is needed to trip...

People keep asking about setting a car battery on a concrete floor somehow ruining the battery. Here is the final answer on the subject. I have the 1930s Popular Science with the original tip in it (but don't ask me which issue). The auto tip was: "Leaving a car battery on a concrete floor...