Kilometres per hour (kph) or miles per hour (mph).
You can't convert units of length to units of time. If it is for a speed problem, use the formula distance = speed x time.
You can't convert between units of time, and units of speed.
Rate of change of speed. It can be the units for acceleration but need not be.
A time graphs units is what is used for the y-axis. This is what show the speed in time.
You would likely use centimeters per year (cm/yr) or millimeters per year (mm/yr) to describe the speed of Earth's tectonic plates as they move along plate boundaries. These units are commonly used in geology to measure the rate at which plates are moving relative to each other.
speed and direction
Kilometres per hour (kph) or miles per hour (mph).
The term used to describe the rate of an object's movement is speed. Speed can be calculated by dividing the distance an object travels by the time it takes to travel that distance. Speed is typically measured in units such as meters per second or kilometers per hour.
Any speed is distance covered/time to cover the distance .Whenever you calculate a speed using this definition, the answer you getis the average speed during the time it took to cover the distance.The same units are used to describe any speed, whether it's average orinstantaneous speed.(any unit of length)/(any unit of time) is a perfectly good unit of speed.
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the units for rotational speed are radians / sec or degrees / sec
To describe the velocity of an object, you need to know both its speed (magnitude of velocity) and direction. Velocity is a vector quantity that includes both the speed and the direction of motion. It is typically expressed in units of distance per unit time, such as meters per second.
Speed describes how fast an object is moving in a given amount of time. It is a measure of the rate at which an object changes position. Speed is typically expressed in units such as meters per second or miles per hour.
The metric prefix used to describe 1000 standard units is "kilo-".
The United Nations
Units such as meters, seconds, kilograms, and kelvin are examples of units that can only describe scalar quantities. These units do not have a direction associated with them and only quantify the magnitude of a physical quantity.