speed
Velocity is defined as speed in a certain direction, or vector.
The speed of light in vacuum is defined to be exactly 299,792,458 metres per second.
This is because speed is defined as the absolute value of velocity - irrespective of the direction of motion.
Also 1.5. That's how the index of refraction is defined.
That's how speed is DEFINED.
speed and wind
speed
The distance travelled divided by time. Distance/time = speed
Velocity is defined as speed in a certain direction, or vector.
Why? Because that's the way speed and velocity are defined.
"Speed" is.
mbps
Instantaneous speed is the speed at a specific instant. It is calculated as the average speed (defined as distance / time), for very small times.
The speed of light in vacuum is defined to be exactly 299,792,458 metres per second.
That is velocity.
That's how "Mach" is defined.