18 miles per second
The speed of light is 186,282 miles per second.
About 4.7 miles per second.
70 miles per second is 252,000 miles per hour.
.8 miles/second
52 miles per second = 187,200 miles per hour.
44 mph = 0.012 miles per second
The universe expands 45 miles every second.
186,000 miles per second. This is the 'miles per second' that it takes light to get anywhere in a vacuum.
10000 miles
0.033 miles per second or about 174.24 feet per second.
6.81 km/s = 4.23 miles per second