Pascal (Pa)

Pascal, written as Pa, is a unit that tells us how strongly something pushes on a surface, like air pressing on your skin or water on a pool wall.

Pressure

Pressure is the force spread over an area, and this guide explains what it means, how we measure it, and how to convert between common pressure units.

Feet per Second (ft/s)

Feet per second is a speed unit that tells how many feet something moves each second, useful for physics, sports and quick everyday speed comparisons.

Knots (kn)

Knots measure how fast something moves over water or through air and this guide explains the meaning, history, and easy conversions for the speed unit kn.

Mach (Ma)

Mach Ma is a way to compare how fast something moves to how fast sound travels in air.

Miles per Hour (mph)

Miles per hour is a speed unit that tells you how many miles something travels in one hour so you can compare how fast cars, trains, and people move.

Kilometers per Hour (km/h)

Kilometers per hour is a unit that tells how many kilometers something travels in one hour, used to measure speed in everyday life like cars and bikes.

Meters per Second (m/s)

Meters per second is a speed unit that tells you how many meters something moves in one second so you can easily compare how fast things are.

Speed

Speed tells us how fast something moves in a certain amount of time and helps us compare motion in daily life, science and travel.

Century

A century is a group of 100 years that helps us measure and talk about long periods of time in history and in everyday life.