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What is a unit of mass?
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- C.G.S. or French or Metric System: This system was originated in France but now it is used in the scientific measurements and also is widely used throughout the world. In this system, the unit of length is centimetre, the unit of mass in gram and the units of time is second. From the initial letters of the words centimetre, gram and second this system is called the C.G.S. system.
- S.I. units: In this system in addition to units of length, mass and time, units of electric current, temperature, luminous intensity and quantity of substance i.e., seven basic units in all are adopted. These are-
unit of mass and convertions are as follows:
milligram = 0.001 gram
1 centigram = 0.01 gram
1 decigram = 0.1 gram
1 kilogram = 1000 grams
1 slug = 14.5939 kilogram
1 kilogram = 0.068521779 slugs
Pounds and ounces are not the unit of mass but a unit of Weight. Weight is different from a mass because a mass becomes weights if it is subjected to a gravitational force or acceleration. The weight of objects at sea level is different when the object is placed at a higher elevation or when the object is placed in moon where there is no gravity there.
Posted by leotor on May 21, 2009 at 2:26 AM (Answer #1)
Mass is a property of matter, and its units are usually measured in grams (g) or kilograms (kg) worldwide and additionally ounces (oz) and pounds (lbs) in the US. On the small scale, atomic mass, or the mass of elemental particles (protons, neutrons, electrons, and whole atoms) are measured relative to an atom of carbon-12, which is set to have a mass of 12.0000. Mass should not be confused with weight, which a measurement of how heavy matter is when subject to the force of gravity, so:
weight = (mass) * (force of gravity) or w=mg.
Posted by enotechris on December 17, 2008 at 12:21 AM (Answer #2)
High School Teacher
Mass is "the amount of stuff" in an object. That is, the amount of atoms and molecules present. Mass in science, is measured in the metric system using units such as kilogram (about 2.2 pounds)nwhich are a thousand grams, grams, centigrams (hundredths of grams), and milligrams (thousandths of grams). Mass is different from weight, Weight is a force. It depends on gravity pulling us toward the center of our planet (or another planet if we ever get there or the moon). If we weighed ourselves on our bathroom scale and noted our weight and then took our scale with us to the moon, we would find that our weight was only one sixth as much there because the force of gravity is much smaller. However, because when we find mass, we use a procedure that compares our object with known mass, our mass would not change regardless of the amount of pull of gravity. This explains why astronauts did not change their size when they were on the moon even though their weight decreased considerably. Well, OK, that's not exactly true. Their size changed just a little. They were temporarily a tiny bit taller because gravity was not pulling them down, compressing their spines a little bit. But that has nothing to do with the definition of mass.
Posted by falkowskiphd on November 12, 2011 at 1:22 PM (Answer #3)
Mass is the amount of matter in an object and the unit of mass is kilogram (kg).
Posted by matthew0109 on November 12, 2011 at 11:16 AM (Answer #5)
Valedictorian, Quiz Taker, Super Tutor, Tutor, Dean's List
Mass = Mass is the amount of material in an object.
Weight = Weight is the gravitational force acting on a body mass.
The SI unit of mass is ( kg )
See you next time
Posted by astrosonuthird on October 22, 2012 at 12:33 PM (Answer #26)
Salutatorian, Dean's List
unit of mass is kg(kilogram) in si system and g(gram) in cgs system..
Posted by friendjoy on November 7, 2011 at 10:17 PM (Answer #4)
There are many units of mass.In S.I ,unit of mass is kilogram(kg),in C.G.S ,gram(g),in F.P.S,pound(lbs).
Posted by uranium9 on November 29, 2011 at 9:49 PM (Answer #13)
grams, milograms, micrograms, all in the metric system.
Posted by idiot101 on December 1, 2011 at 8:58 AM (Answer #14)
The metric unit of mass is 1 kilogram, as represented by the International Prototype Kilogram stored in Paris.
The gravitational pull that the Earth exercises towards a 1-kilogram mass is 1kg * 1 G = (roughly) 9.81 kgm/s2 = 9.81 Newton. Note that the Earth's gravitational pull varies by 1% depending on where you are on the Earth.
An earlier answer suggested that the Moon has no gravity. Not true. The gravitational pull of the Moon is roughly 1/6 of Earth's gravity. The Standard kilogram would therefore weigh some 0.166 kilograms in the Moon.
Posted by qed on December 4, 2011 at 5:56 AM (Answer #15)
The SI unit of mass is kilograms but there other derived units like tonnes, metric tonnes e.t.c
Posted by jphanuels on December 4, 2011 at 7:54 PM (Answer #16)
Mass is the amount of matter in an object. The SI base unit is kilograms (kg). Mass is NOT weight. Weight is correctly measured in Neutons and it is a measure of gravitational force.
Posted by aabbeir on December 7, 2011 at 3:05 AM (Answer #17)
the SIunit of mass is kilogram(kg)
Posted by saransh2012 on December 8, 2011 at 11:18 PM (Answer #19)
Mass is the Property of matter and is usually measured in grams and
Posted by sargam21 on December 17, 2011 at 6:23 PM (Answer #20)
Posted by cooldarena on December 17, 2011 at 9:05 PM (Answer #21)
gram, kilogram, decigram, etc
Posted by twainlover13 on December 18, 2011 at 1:13 AM (Answer #22)
Elementary School Teacher
A unit of mass is a measurement of mass. It is actually a measurement of how much matter there is.The closest concept is weight. Let's understand the difference between weight and mass. A 50 lb. dumbell is twice the mass of a 25lb. weight.If these dumbells are on the surface of the moon,they will weigh less because of less gravitational pull.The change of weight might be seen by being able to lift the weights with two fingers as though it was styrofoam.So weight is variable in relation to gravitational pull.However the ''amount of matter'' or ''mass'' did not change when it was on the moon.
One way of measuring mass is used in particle physics. The ''atomic weight''( despite it's name) is one scale used to measure the mass of different elements.Hydrogen has an atomic weight of 1. It contains one proton.Helium has an atomic weight of 4 and its nucleus has 2 protons + 2 neutrons.
Posted by brooklynlotus on December 28, 2011 at 8:50 AM (Answer #23)
Posted by avanish on December 29, 2011 at 9:47 PM (Answer #24)
Valedictorian, Tutor, Dean's List
The property a body has of resisting any change in its state of rest or uniform motion is called inertia. The inertia os a body is related to what we think of as the amount of matter it contains. A quantitative measure of inertia is mass: The more mass a body has, the less its acceleration when a given net force acts on it. The SI unit of mass is the kilogram (kg).
source: Applied Physics, 2012.
Posted by alejandrogalarce on October 12, 2013 at 6:06 PM (Answer #35)
Posted by enotessophia10 on November 5, 2011 at 2:26 AM (Answer #6)
Posted by saransh2012 on November 6, 2011 at 11:37 PM (Answer #28)
The SI unit of mass is Kilograms (Kg).
1 Kg = 1000gm
and gm molecular mass of any substance is equal to 1 mole.
Posted by shivadatta on November 13, 2011 at 11:33 AM (Answer #29)
The Gram is the standard metric (and SI) unit of mass.
I believe that the kilogram is now the standard metric and SI unit and the gram is defined as 1/1000 of a kilogram
Posted by javaria95 on November 14, 2011 at 6:56 AM (Answer #7)
Posted by sid464666 on November 17, 2011 at 5:45 PM (Answer #8)
Salutatorian, Dean's List
Posted by azzyj on November 20, 2011 at 1:32 AM (Answer #9)
The amount of constituent particles that a matter contains is said to be its mass. Its very different in respect to weight. It is common misconception that mass and weight are almost same but they are very different infact. Coming to the point the SI units of mass is kilogram(Kg).
Posted by joy1495 on November 24, 2011 at 12:16 AM (Answer #31)
Posted by shados97 on November 24, 2011 at 12:38 AM (Answer #10)
the unit for mass is kilograms and the unit for weight is kg m/s^2 or Newton (N).
Posted by hyunjae on November 26, 2011 at 3:42 PM (Answer #11)
Mass is the amount of matter contained in a substance.
The unit of mass is Kilogram(Kg).
Posted by akshay123456789 on November 29, 2011 at 3:17 PM (Answer #12)
Valedictorian, Dean's List
Posted by bergcar on January 7, 2012 at 9:20 AM (Answer #32)
Elementary School Teacher
gram, killogram, milligram
Posted by mrstyndall on May 9, 2013 at 5:16 AM (Answer #34)
the unit of mass is KG(s)
Posted by nado on January 15, 2009 at 6:36 PM (Answer #27)
The ammount of matter contained in a body is can be termed as mass.
According to different system of unit are used in the different parts of the world. These systems are mainly the methods of defining the three fundamental units. The most widely used system of units is CGS or French or metric system.
In 1960, at Eleventh General Conference on Weights and Measures held at Paris, an international system of units is adopted to have a consitent system of units and also to simplify the communications amon the scientists. This system of units is known as Le Systeme International d' Unites abbreviated as SI units.
PHYSICAL QUANTITY UNIT SYMBOL
1. length metre m
2. mass kilogram kg
3. time second s
4. electric current ampere A
5. temperature kelvin K
6. luminious intensity candela cd
7. quantity of a substance mole mol
Posted by swetank on November 13, 2011 at 10:16 PM (Answer #30)
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