You might be thinking of the word origin.
Zero relative velocity to another object, sure no problem. Zero absolute velocity, not possible as there is no absolute reference to compare to.
A Benchmark Fraction.If Zero is the description of nothing then it would be a useful reference point as everything else can be clearly defined
For temperatures, zero is an arbitrary reference point, depending on which scale is used. For Celsius, zero is assigned the the temperature at which water freezes. So temperatures which are colder than this temperature will be negative values, and temperatures warmer will be positive values. Fahrenheit uses a different reference point for zero, but similar principles apply.
The reference for longitude ... the definition of 'zero' longitude ... is the Prime Meridian. That imaginary line joins the north and south poles, and runs through Greenwich, a suburb of London, UK.
Because its the zero reference.
It is a point that is declared to be zero for the purposes of calculations.
The Equator is the zero reference for latitude.The Prime Meridian is the zero reference for longitude.
You might be thinking of the word origin.
pls provide reference for your answer ARYABHATTA
An origin or zero point.
The latitude and longitude references are lines, not points. The reference for latitude is the line that forms a circle and consists of all points with zero latitude. That line is called the "equator". The reference for longitude is the line that forms a semi-circle and consists of all points with zero longitude. That line is called the "Prime Meridian".
Zero relative velocity to another object, sure no problem. Zero absolute velocity, not possible as there is no absolute reference to compare to.
The LEAST count would be Zero (0). This is not trivial. There is an established standard for what Zero actually is, as a reference point in Air.BS EN ISO 389 (1997) "Acoustics. Standard reference zero for the calibration of pure tone air conduction audiometers"
This is not a math number. It looks like a reference code of some sort. "Three zero zero zero dot zero one 4 dot etc"
The equator is zero latitude.
Sea level is the reference, zero height.