Is ten minutes long

Answer 1

According to Einstein's famous Theory of Relativity, the answer depends on the observer's frame of reference, and it can be different for different observers. If the observer is sitting on a hot soldering iron or standing on a campfire, then ten minutes appears to be many years long. If the observer's girl friend is sitting on his lap, then ten minutes appears to be shorter than the bit time on a multi- gigabit fiber trunk. Everything is relative to the individual observer.

It could be stimated by an activity. for instance, If you want to hold your breath for ten minutes is long but if you are having fun doing something, ten minutes is a very short time.