Rate of change alarms differ from normal level alarms in that they respond to the change in a variable over a period of time, rather than the absolute value of the variable. See how these alarms work ...

A satellite is dropping back to Earth. The distance it has fallen, \(D\) metres, since first spotted is given by \(D(t) = 100t + 5{t^2}\), where \(t\) is the length of time in seconds since first ...

Differentiation is used in maths for calculating rates of change. For example in mechanics, the rate of change of displacement (with respect to time) is the velocity. The rate of change of velocity ...