What does kg stand for in weight

What Is a Kilogram? Conversion of Kilograms 3. Solved Examples on Kilogram 4. Practice Questions on Kilogram 5. Conversion of Kilogram.

Important Topics. Measuring Weight. Solved Examples on Kilogram. Example 1: Convert: a. Example 2: Eric bought 5 kg g of flour and 3 kg g of sugar to bake cookies. He used 3 kg g of the flour and 2 kg g of sugar.

What quantity of flour and sugar was left behind? Example 3: A vegetable truck was loaded with kg g of vegetables and kg g of fruits. Find the total weight carried by the truck. Example 4: There are two stones in the park. One stone weighs 5 kgs and the other one weighs 5 lbs. Which one of them was heavier? Solution: To compare the weight of both, they both must be in same units.

Let us convert 5 lbs to kgs. Example 5: A bag contains 12 kg rice. Will consumers catch on? Jessica Wolfrom June 17, Washington Post. Are Cellphones Really a Cancer Risk?

Rome Mildred Anna Rosalie Tuker. The Great Events by Famous Historians, v. Montessori Elementary Materials Maria Montessori. One kilogram is equivalent to 2. Symbol: kg. The base unit of mass in the International System of Units, equal to 1, grams 2. Published by Houghton Mifflin Company. The basic unit of mass in the metric system, equal to 1, grams 2. So, the kilogram was originally defined as the mass of a cubic decimeter of water a decimeter being a tenth of a meter , while the meter itself was calculated as a fraction of the distance between the North Pole and the Equator.

A section of this imaginary line running through Europe was measured painstakingly by hand, inch by inch, in a seven-year journey across the continent. If any country needed to create their own meter standard, they could, theoretically measure it themselves. Over the next century, though, as the metric system was adopted by more nations and new units were added, scientists began to worry that the world was not enough.

Consistent units of measurement are the foundation of the scientific method. Without them you cannot reliably repeat experiments, and if the results of your experiments are not reliable, then neither is your understanding of the world. The solution? Like animals fleeing rising floodwaters, metrologists sought higher ground, epistemologically speaking.

Instead of using the Earth as a basis for defining units, they decided to use constants of nature — numerical or physical quantities thought to be unchanging throughout the universe. It was the meter that was the first to be pegged to a constant. Over the past few decades, six of the seven units of the metric system — the meter, the second, the ampere, the Kelvin, the mole, and the candela — have undergone the same transformation.

Now, only one artifact-based unit remains, the kilogram, and metrologists are itching to get rid of it. None are immutable. Le Grand K has proved this point itself. Although the kilogram is made of one of the most stable alloys known to science and treated with reverential care — it has sat, undisturbed, in the same location for almost its entire life, encased in a trio of vacuum-sealed bell jars — it has also, inexplicably, been losing weight.

During ceremonial weigh-ins that take place every few decades, when reference copies of the International Prototype Kilogram are flown in from around the world and compared to their distinguished forebear, the IPK has been found to have lost around 50 micrograms in mass, roughly equal to a single eyelash. To metrologists these fluctuations are no more than an embarrassing gaffe.

With the redefinition on Friday, the age of physical artifacts — and its attendant imperfections — will be left for good. The heavens are a fine template for scientific achievement, but are not easily accessible from Earth. Redefining the kilogram using universal constants has been a grueling, if mostly unremarked project, involving decades of research by labs around the world; the fruits of two Nobel Prizes in quantum physics; and the construction of some of the most intricate machinery ever built.

The end result of all this hard work is an instrument known as the Kibble balance. This was invented in by British physicist Bryan Kibble, and has been optimized since to reach new levels of accuracy. Despite its complications, the Kibble balance works like a traditional set of scales or beam balance, just like those you might use to weigh groceries.

But while these scales usually weigh one mass against another, the Kibble balance weighs mass against an electromagnetic force which can be measured extremely accurately. This electromagnetic force is generated using a coil of wire surrounded by permanent magnets. This setup can create two different methods of weighing.

In the first, you run a current through the coil of wire to generate electromagnetic pull. In the second, you physically move the coil up and down like a piston, which has the same effect. Due to a number of recent discoveries including those Nobel Prizes we mentioned , we can measure some of the forces involved in both of the weighing modes with incredible precision.