# Time

Time is a measure in which events can be ordered from the past through the present into the future, and also the measure of durations of events and the intervals between them. Time is often referred to as the fourth dimension, along with the three spatial dimensions.

Time is one of the seven fundamental physical quantities in both the International System of Units and International System of Quantities. Time is used to define other quantities—such as velocity—so defining time in terms of such quantities would result in circularity of definition

vCalc's Time folder consists of conversion factors for units of time.

## Time Equations

• delta t
• Force (F = M * Delta V"/"Delta T)
• Adjusted Retention time
• Days Since Event (Birth, 16 years old, marriage, etc)
• Distance (Deltax)
• Factor de Retención
• Ley de Velocidad de Segundo-Orden (forma integral)
• Retention Factor
• Second-order rate law (integral form)
• Tiempo de Retención Ajustada
• Torricelli's Law