The speed will depend on its initial velocity and any forces acting on it.
Chat with our AI personalities
About 2/3 its speed in a vacuum.
The speed of light is not limited in a vacuum - the speed of light is fastest in a vacuum. But that is what Einstein called the "Cosmic Speed Limit" - nothing can move faster than the speed of light in a vacuum, or even quite asfast.
The speed of light is 186,000 miles per second in a vacuum.
no
The speed of light in vacuum is 299,792,458 meters per second, and that's not an average. That's what it always is.