Is there (or can there be) a device that could measure the speed and acceleration of time?
The "speed of time" can only be measured by comparing two clocks. That needs Relativity (as noted in other answer). Light speed is fixed so the speed at which an oscillator (pendulum) relative to a differently accelerated observer gives us the "speed of time" for each. So their is no right or preferred speed of time.
In order to create such a clock a stationary point in the universe would have to be located, or at least we would need to know how we are (it is) moving in the universe in order to create it. Since we cannot find such a point or know such a thing, no such device can be created and we will have to make do with our current various chronometers.
protected by Qmechanic♦ Aug 8 at 11:10
Thank you for your interest in this question.
Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.
Would you like to answer one of these unanswered questions instead?