"I'll know better when I've had a chance to judge their relative speed," she said.

Within 5 minutes it could reach the relative speed of light.

But all of them were caught in a stern chase with low relative speed.

The computer calculates the distance and the relative speed of the car in front.

In 10 minutes the two space giants reached the relative speed of light.

I should have some idea of relative speed in a week or so.

The relative speed of the two objects is less than the escape velocity.

It may also tell us something important about the relative speeds of the two decades.

We, too, of course, regret having to discuss these issues with relative speed.

No doubt the California had already made the transition, because they only needed 5 minutes to reach the relative speed of light.