Measuring speed requires time (T) and a known distance (D). Using the formula distance = rate x time (D=R*T), one determines the average speed by dividing distance by time, or R = D/T. This method assumes the object being measured is already in motion.
Know MoreTime units are always in hours, minutes or seconds. Distance units can be either metric or imperial.
Select two points, A and B, to represent the known distance. It should be long enough to make an accurate time measurement. The shorter the distance, the more precise the time measurement must be.
As the object passes point A, start measuring the time. Using second hands on a watch or stopwatch increases accuracy when using shorter distances.
Note the elapsed time the object took to travel between the two points.
Using the formula R = D/T, determine the average rate of speed. This is usually expressed as distance per time unit.
The amount of milligrams in a milliliter depends on the material being measured. A milliliter is a unit that measures volume, and a milligram is a unit that measures mass.
Full Answer >Absolute zero is measured at 0 degrees Kelvin, which equals -273.15 degrees Celsius or -459.67 degrees Fahrenheit. It is the coldest temperature possible on the Kelvin scale. For the sake of comparison, the average temperature of the universe is approximately 2.7 degrees Kelvin.
Full Answer >Speed is measured in many different ways, and the most common are kilometers per hour and miles per hour. An object moving at 250 mph travels much faster than an object traveling 250 kph.
Full Answer >Air pressure is measured by using a barometer, the value of which is given in varying units, including inches of mercury (in Hg) or millimeters of mercury (mm Hg), torr (Tor), bar or millibars (mb), pounds per square inch (psi) and pascal (Pa). Standard atmosphere, which refers to the sea-level atmospheric pressure at 0 degree Celsius, is expressed in atmospheres, commonly abbreviated to atm. One atm is equal to 29.92 in Hg, 760 mm Hg, 760 Tor, 1.013 bar, 1,013.25 mb, 14.7 psi and 101,325 Pa.
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