the earth spins once on its axis during the time we call a day
Mars.
24 hours.
it's rotation
Mars has a day of 24 hours 39 minutes and 35 seconds
i dont know yet
The tides are slowing the earths rotation and making the day longer.
spinning
The length of the day
it means that the earth will travel one spot and back to that same spot in 1 day
It relates because it takes 24 hours for earth to fully rotate and for twelve of those hours it is facing the sun. When the ratation slightly shifts during seasons, the day is longer or shorter for the amount of time facing the sun changes.
The days may feel longer after a tsunami but no, the length of the day depends on the earths rotation not tsunamis.
The length of a day would increase and the number days in a year would decrease.