500 feet per second = 340.9 mph
500 feet in 3 seconds = 113.64 mph
Not fast at all. 80 mm per second = 0.18 mph.
About 245.45 miles per hour at 360ft/s
10,000km per hour is the same as 6,213.71 miles per hour.
About 1.364 miles per hour.
205.3 feet per second at 140 mph
15.0 feet per second is equivalent to: 10.23 miles per hour.
1,000 feet per minute is about 11.363 miles per hour.
293.2 miles per hour.
395 (feet / second) = 269.32 mph
About 4,132 miles per hour.
About 20.5 miles per hour.
3,600 miles per hour.
465 feet per second is equal to about 317 miles per hour.
It is 2,727 MPH. And that's fast.
280 feet per second is 190.91 miles per hour.
That is 146.7 feet per second.
It's 10.2 miles per hour. (rounded)