Recent content by Curious Kev

Then there is no reason why one clock should run slower than another. There isn't an explanation in terms of structural change.

I meant to say that their acceleration history in terms of energy per unit mass gained or lost would cancel out if they were stationary relative to each other. Of course, tracing a complete acceleration history is not possible with an unlimited time regression. But this equality seems reasonable...

But with two atoms that were stationary relative to each other, their acceleration history would be the same!

Forgive the length of this but I think it's a clear argument. Suppose the history of acceleration is unknown. Two spaceships A and B pass each other in opposite directions at 0.8c in field free space. They each then start to send the other a signal at one second intervals. That way, the...

Do you mean that the loss of time in the one traveling away from the earth is due to the time spent accelerating? Because he need not be accelerating for the whole journey. What if the acceleration is turbocharged for just one minute? Would the loss of time occur only in that minute...

Can anyone clarify the relativistic twin paradox for me? Here's my understanding of it. Twins on earth synchronize their clocks. One twin stays on earth and the other accelerates away in a space ship to 0.8c, say. After a time lapse of one year, say, on earth, the accelerated twin need not...

Vectors are collinear when they are parallel (which means they are coplanar) and share one end point.

Mathematical Conundrums, CRC Press, 2023, has some original problems.

It is better to assume ignorance before malevolence. Please remember, I am a real human being. You must imagine that you are talking to me in a room and that you can see my facial reaction to your comment. From what I've read, Gavran and PeroK have been very helpful. Thanks.

This is from the front cover of Mathematical Conundrums, CRC Press, 2023. << When Holly was twice the age Ivy was 15 years ago, Ivy was half the age Holly will be in 12 years time. How many years ago was that? >> OK, but why isn't the age of Holly and Ivy given?