Mars.
Yes; the faster the planet rotates, the shorter its day will be.
It is the rotation of the planet one complete revolution that determines the length of a day.
The length of the day
How long it spins on it's axis
None of them. The nearest planet to have a day-length of 9 hours is Jupiter, on which days last 9 hours and 56 minutes precisely. Under 10 hours.
Mars
Mars has a day of 24 hours 39 minutes and 35 seconds
24 hours.
Mars is pretty close, at about 24 hours and 37 minutes.
i dont know yet
No
Yes; the faster the planet rotates, the shorter its day will be.
Because of the difference in speed of rotation of each planet.
The tides are slowing the earths rotation and making the day longer.
by the rotation of the planet
The length of time it takes to complete one full rotation
It is the rotation of the planet one complete revolution that determines the length of a day.