A Stop Watch
it is measured by an instrument called Anemometer
100 kilometers is a measure of length and distance, not speed. 100 km/h is a measure of speed, which is pretty fast.
faster than me
Your speedometer! It tells you how fast you are going at that instant.All different types of devices are used to measure instantaneous velocity including chronographs, lasers, and radars.
100:52kg x your height in meters squared
you can measure the density of plastic using an instrument called electronic densimeter. this densimeter give you the density measurements very easily and fast. below is few models of this instrument.http://www.worldtesters.com/Tester_Meters/Densimeters.htm
no, measure is an amount, size, degree, etc. how fast something is going is the speed like 15 meters per second, 50 miles an hour etc.
Doesn't work like that. Meters per second is a measure of speed. 125 km is a distance. There's no direct comparison between the two. You might as well as how fast a mile is.
a stopwatch
None. 50 kilometres is a measure of distance. Metres per hour is a measure of speed or velocity. The two measure different things and it makes no sense to try and convert one to the other. The question is like asking how fast is the length of your room!
4.5 meters in 9 second how fast in kilometer per hour?
He runs the 100 meters in 9.98