Convert Millimeters Per Second to Miles Per Day (mm/s to mi/day) ▶
How to convert
1 mile per day (mi/day) = 18.62666667 millimeter per second (mm/s). Mile Per Day (mi/day) is a unit of Speed used in Standard system. Millimeter Per Second (mm/s) is a unit of Speed used in Metric system.
Miles Per Day
Definition of Miles Per Day
Miles per day (mi/d) is a unit of speed that measures how fast something is moving in terms of miles per unit of time. It is commonly used in the United States, the United Kingdom, and some other countries that use the US Standard system of measurement or have close historical ties with them. It is often used for measuring the average speed or distance traveled by an object or phenomenon over a period of time that is measured in days or longer.
One mile per day is equal to 0.0416666667 miles per hour, or 0.0185185185 meters per second. It can also be converted to other units of speed, such as kilometers per hour, feet per second, or knots, by using appropriate conversion factors.
How to Convert Miles Per Day
To convert miles per day to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert miles per day to kilometers per hour, we need to multiply by 1.609344, since there are 1.609344 kilometers in one mile. To convert miles per day to meters per second, we need to multiply by 0.018518518518519, since there are 0.018518518518519 meters in one mile.
Here are some examples of how to convert miles per day to other units of length in the US Standard system and the SI system:
Where Miles Per Day Are Used
Miles per day are mainly used for measuring the average speed or distance traveled by an object or phenomenon over a period of time that is measured in days or longer. They are often used in fields such as travel, fitness, sports, and geography, where the speed or distance traveled by an object or phenomenon is measured in terms of miles per unit of time.
For example, a person may travel an average of 100 mi/d on a road trip across a country, which means that they cover an average distance of 100 miles in one day. A runner may run an average of 5 mi/d as part of their training routine, which means that they run a distance of 5 miles in one day. A planet may have an orbital velocity of thousands of miles per day, which means that it covers thousands of miles along its orbit in one day.
Miles per day are also used in some other fields where the speed or distance traveled by an object or phenomenon is measured in terms of miles per unit of time.
History of Miles Per Day
The origin of miles per day as a unit of speed can be traced back to the development of the US Standard system and the mile as a unit of length in the late eighteenth century. The mile was defined as one thousand six hundred and nine meters (or eight furlongs) based on the English statute mile.
The term mile first appeared in English in the late fourteenth century, but it was not until later in the early nineteenth century that the use of miles per day became more common; before that, other units such as miles per hour or leagues per day were preferred for expressing speed.
Miles per day have been used ever since as a standard unit of speed for measuring the average speed or distance traveled by an object or phenomenon over a period of time that is measured in days or longer. They have also been adopted by some international organizations and conventions, such as the International System of Units and the International Astronomical Union.
Example Conversions of Miles Per Day to Other Units
Here are some examples of how to convert miles per day to other units of speed, using the conversion factors given above:
How to convert millimeters per second
Millimeters per second can be converted to other units of speed or velocity by using simple conversion factors. Here are some common units and their conversion factors:
Where millimeters per second are used
Millimeters per second are mainly used in microbiology and nanotechnology to measure the speed or velocity of microscopic organisms and processes.
For example, the average speed of a bacterium such as Escherichia coli is about 10-20 micrometers per second, which is equivalent to 0.01-0.02 mm/s.
The average speed of a virus such as influenza A virus is about 1 micrometer per second, which is equivalent to 0.001 mm/s.
The average speed of a nanorobot such as a DNA origami walker is about 4 nanometers per second, which is equivalent to 0.000004 mm/s.
Definition of millimeters per second
According to the SI definition, one millimeter per second is the speed of a body that covers a distance of one millimeter in a time of one second.
Mathematically, it can be expressed as:
where v is the speed or velocity in millimeters per second, s is the distance traveled in millimeters, and t is the time taken in seconds.
History of millimeters per second
The concept of speed or velocity has been studied since ancient times by philosophers and scientists such as Aristotle, Galileo, Newton, etc.
The millimeter was originally derived from the meter in the late 18th century as one thousandth of a meter.
The second was originally defined in terms of the Earth’s rotation as one eighty-six thousand four hundredth of a mean solar day.
The combination of these two units resulted in the millimeter per second as a unit of speed or velocity.
The millimeter per second was officially adopted as part of the SI system in 1960.
Example conversions of millimeters per second to other units
Here are some examples of converting millimeters per second to other units of speed or velocity:
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