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Mars.
The actual length of a day is 23 hours, 56 minutes and 4.09 seconds
the outer four have longer days
The length of day and night is equal at the Vernal and Autumnal equinox.
Day and night are of equal length throughout the year at the equator.
One spin is what measures the length of one day
Humidity is dampness in the air. The intrument that measures it is a hygrometer, and a day with low humidity is more comfortable because its easier to breath
I measure the distance I travel to work, the length of cable required to install an antenna, the time required to haul my present mass up the tower, and how I will satisfy my capacity for liquid refreshment when the job is done.
i play instrument all day long
Once a day. One spin is what measures one day.
the length of day on earth is 24 hours
Mars
Mars.
The length of the day in th US is the same as the length of the day anywhere else in the world, roughly 24 hours.
the length of a day on Jupiter is average, 9.9 hours
See answer given for length of Venus day in hours.
the length of the day is not a fixed unit of time