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How is mass defined? A measure of how much matter is in an object. It is measured in grams, kilograms and, tonnes (Metric) or ounces and pounds (US units) How many micrograms (µg, ug or mcg) in a milligram (mg)? 1000 micrograms = 1 milligram, and 1000 milligrams = 1 gram. |
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Mass refers to the intrinsic property of all material objects to resist changes in their momentum. Weight, on the other hand, refers to the downward force produced when a mass is in a gravitational field. In free fall, (no net gravitational forces) objects lack weight but retain their mass. The Imperial units of mass include the ounce, pound, and ton. The metric units gram and kilogram are units of mass.
One device for measuring weight or mass is called a weighing scale or, often, simply a scale. A spring scale measures force but not mass, a balance compares weight, both require a gravitational field to operate. Some of the most accurate instruments for measuring weight or mass are based on load cells with a digital read-out, but require a gravitational field to function and would not work in free fall. We also use some special names for some multiples of some units. * 100 kilograms = 1 quintal; 1000 kilogram = 1 metric tonne; * 10 years = 1 decade; 100 years = 1 century; 1000 years = 1 millennium Converting between Metric Units of Mass The metric system has prefix modifiers that are multiples of 10. * A kilogram is 1000 grams * A hectogram is 100 grams * A decagram is 10 grams * A gram is the stem unit of mass * A decigram is 1/10 gram * A centigram is 1/100 gram * A milligram is 1/1000 gram How many pounds in a kilogram? The answer is 2.20462262185. |