Units of speed are always a unit of length per unit of time. Different units of length and time may be chosen depending on the situation. This makes it easier to read the measurements. For example, ...

We discuss the difference between distance and displacement. Unit 2 Segment A: Distance and Displacement We discuss the difference between distance and displacement and look at examples of what ...

The Hubble constant is one of the most important numbers in cosmology because it tells us how fast the universe is expanding, which can be used to determine the age of the universe and its history. It ...

Stride length and step length are two important measurements in gait analysis. Gait analysis is a study of how a person walks and runs. Doctors use visual observation and tools to measure and assess ...