It is called a definition.
There are different types of speed formulas: Speed= Wavelength(frequency) or Speed= Distance/Time
c=3.8x10^8
The definition of speed is the size/magnitude/measure of an object's velocity. Average speed = distance divided by time
Averaged speed = distance traveled during some time/time to cover the distance .
It is called a definition.
Depending on the definition of safe; very, very safe.
NO! Depends on your definition of safe?
The definition of the speed of light in a vacuum is 300,000,000 meters/sec, or 186,000 miles/sec.
Initial speed is the original, beginning speed of an object.
If the posted speed is not safe at that time
A haven is a safe place, usually a safe harbour.
Depends on your definition of safe.
they are fast
Quickness, speed
The speed that an object moves through the air.
Great speed is faster than normal.