miles per second

At so many miles per second no possible human action could change any happening.

The difference between the positive and negative lines of force is 16,000 miles per second.

With a little practice, you will be able to travel anywhere on Earth at the rate of many miles per second.

And dawn came on at seven hundred miles per second.

The acceleration must have reached more than 300 miles per second.

It would need to gain a speed of almost 5 miles per second.

Then she was alone, falling beneath the earth at three miles per second.

In half a minute it was tens of miles per second.

"They're out of sight again, but I make it about four to seven hundred miles per second."

Their speed in miles per second was, at the moment, greater than that of the Platform.

So the ship backs up at hundreds of miles per second!

But things travelling at four miles per second are not easy to anticipate.

They were climbing at better than two miles per second, now, and still increasing their speed.

The Gazelle now moved along at about 600 miles per second.

They must have hit an asteroid-like body at a speed of over 100 miles per second.

A spacecraft hits it up in the hundreds of miles per second.

This ship was' figured for a total change of twelve and a half miles per second.

We've got five miles per second on those snout ships.

The masses were approaching Earth at around fifty miles per second.

Joe's ship was moving eastward above the Earth at so many miles per second.

There was something travelling southward at four miles per second.

"You were also doing about twenty miles per second with respect to this beach.

The wrench then goes into orbit, probably at a speed of something like 6 miles per second.

"We are approaching the primary at perhaps thirty miles per second.

Twenty thousand miles to go, at four miles per second.