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 number of milligrams in 1 teaspoon varies according to the density of the substance being measured. Milligrams are a unit of weight; the teaspoon is a unit of volume equivalent to 5 milliliters. These measurements are part of the modern metric system established by the International System of Units.
Full Answer >Rainfall is measured in either millimeters or inches. The specific unit of measurement used depends on the county. While rainfall is measured in inches in the United States, most countries in the world adopt the metric system and use millimeters or centimeters instead of inches.
Full Answer >Density is measured by an object’s mass to volume ratio. The formula, which is expressed as density=mass/volume, quantifies how much matter is packed into the underlying object or space. Density is often measured in kilograms per cubic meter.
Full Answer >The volume of a liquid can be measured in the lab with a beaker, graduated cylinder, burets, pipette or micropipette. The instrument used depends on the actual volume of the liquid and the desired degree of accuracy.
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