There are 5280 feet in a mile, and 3600 seconds in an hour. Thus:
22 ft/s = (22/5280)(3600) = 15 mph.
500 feet per second = 340.9 mph
1,200 feet per second equates to 818.2 mph.
240 mph = 352 feet per second.
Approximately 102.3 mph at 150 feet per second.
29.3 feet per second at 20 mph.
250 feet per second = 170.45 mph
300 feet per second = 204.54 mph
54 mph is 79.2 feet per second.
1,309 mph
500 feet per second = 340.9 mph
150 mph
About 36.5 mph.
395 (feet / second) = 269.32 mph
4,815 mph
It is 2,727 MPH. And that's fast.
96 (feet / second) = 65.45 mph
1,200 feet per second equates to 818.2 mph.