Convert Knots to Millimeters Per Second (kt to mm/s) ▶
How to convert
1 millimeter per second (mm/s) = 0.001943844 knot (kt). Millimeter Per Second (mm/s) is a unit of Speed used in Metric system. Knot (kt) is a unit of Speed used in Standard system.
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:
Definition of Knots
Knots, commonly denoted kn, is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). It is the standard unit of speed used in meteorology, and in maritime and air navigation. A vessel travelling at 1 kn along a meridian travels approximately one minute of geographic latitude in one hour.
How to Convert Knots
To convert knots to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert knots to kilometers per hour, we need to multiply by 1.852, since there are 1.852 kilometers in one nautical mile. To convert knots to meters per second, we need to divide by 3.6, since there are 3.6 seconds in one hour.
Here are some examples of how to convert knots to other units of length in the US Standard system and the SI system:
Where Knots Are Used
Knots are used in various fields of science and technology where the speed and direction of movement of objects or phenomena are measured or applied in relation to water or air currents. For example:
History of Knots
The origin of knots as a unit of speed can be traced back to the ancient practice of measuring the speed of ships by using a device called a chip log or log-line. This device consisted of a wooden board attached to a rope with knots tied at regular intervals along its length. The board was thrown overboard from the stern of the ship and allowed to drag behind it while the rope was let out for a fixed amount of time (usually measured by a sandglass). The number of knots that passed over the rail of the ship during that time indicated the speed of the ship in nautical miles per hour.
The first recorded use of this method was by the Phoenicians around the second millennium BCE. The device was later improved and standardized by various civilizations such as the Greeks, Romans, Arabs, Vikings, Chinese, and Europeans. The length of the nautical mile and the spacing of the knots varied from place to place and from time to time until they were fixed by international agreement in the late nineteenth century.
The term knot was derived from the Old English word cnotta meaning “a knot”. It was first used as a unit of speed by English sailors in the early seventeenth century.
Example Conversions of Knots to Other Units
Here are some examples of how to convert knots to other units of speed, using the conversion factors given above:
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