Britain's speeds are signed in mph.
(Car speedometers measure in mph, but coach and lorry tachographs measure in kph.)
No.
Speed.
The notorious, infamous Cyclone Yasi reached wind speeds of up to 290 kilometres per hour.
Leopards can run at speeds approaching 58 kilometres per hour, or 36 mph.
8 kilometres per hour (5.0 mph) but when feeding or attacking, the average shark can reach speeds upwards of 19 kilometres per hour (12 mph).
Velocity is a vector, which means it has both size and direction. The size of a velocity is its speed, speed is measured in metres per second, faster speeds are measured in kilometres per hour. ; but the official base unit is metres per second.
There are many instances: for example, speed is measured in kilometres per hour where the ratio is measured between a distance (measured in kilometres) and time (measured in hours). So it is no big deal except that you need to mention the units.
I believe at higher speeds there will be more air resistance.
Speed limits in Britain are quoted in miles per hour and in Europe they are quoted in kilometres per hour.
Speed is measured in metres per second (or kilometres per hour), and length is measured in metres.
Speed is distance divided by time. So : you could have meters per second, or meters per hour, etc.
Miles per hour (MPH), or kilometres per hour (KPH) are time travelled by the car over a measured distance.