Explain how weight and mass differ.?
111372
mass is the amount of matter, weight is the force gravity exerts on an object. mass stays the same, but weight changes if you go to the moon etc.
161627
Mass can be defined as any structured  Matter that forms a volume. As opposed to other substances which are not mass and cannot be weighted;examples are masseless particles described in Relativity theories.\nWeight describes an interaction between two masses.\nBoth masses when touching would experience a force which we call weight. We on earth are able to sense weight. The greater the mass ,the more weight we feel.\n\nThe standard of weight is the kilogram which is measured on a balance scale is really a comparative measurement of mass.\nThe reason is that on a balance scale both masses experience the same acceleration. (aceleration is a measure of how much you are pushed down by gravity). Hence ,no matter where the scale is located in the gravity field it will always measure the same.\nHowever the case is not the same in a spring scale,because it directly measures a gravitational force. The scale at sea level would read different weight than the one on top of a high mountain. \nYou would not feel any weight if you were far away from a large mass as the earth. Since you have no mass interaction you would be weightless but not massless. Nevertheless, The gravity phenomena will still keep  you body in one piece.\nThe subject of measuring mass and weighing mass is not very clear to most people. It is very confusing ,so don't feel bad if you find it that way.
845623
no, mass and weight are not equivalant but they are related to each other according to:\nw=mg\n\nand mass and energy relationship is:\nE=mc2\nwhich means mass is one type of energy itself\n\nNotice that g is not a constant while c is.
32418
1 inch ~ 2.54 cm\n1 ft ~ 30.48 cm\n\ntechnically, a pound (lb) and grams/kilograms do not measure the same thing. a pound is a measure of weight (a force) while a gram is a measure of mass.  At sea level on earth, where gravity is about 9.81 m/s^2, a mass of 1 kg would approximately have 2.2 lb of weight.  But for basic science classes, this is assumed to be interchangeable
794045
we have F= G*M*m/r^2  and F=weight\n\nwhen M=M and r= r/2 then F=G*M*m/ (r/2)^2\n\ntherefore F(new)= 4*F and hence new weight is 4 times.\n\nthis is due to change in the value of g(acceleration due to gravity)\n\nsince F=mg= G*M*m/r^2   and hence only g is effected\n\nand hence weight also changes mass remainig same.
374421
mass=density over volume\n\n=)
89835
In terms of mass.\nThe SI unit for mass is the kilogram (kg).\n\nDo not confuse mass with weight, they are not the same thing.  The mass of an object is constant throughout the universe where as weight is a vector force that depends on the gravitational field around the object.  It is unfortunate that these two words are used interchangably sometimes.
305550
A pound of fat weighs the same as a pound of muscle, it's just that the muscle is more dense than fat, so it takes up less space than fat.
69858
Weight is a force.  The National Institute of Science and Technologiy defines it here as such.\nhttp://physics.nist.gov/Pubs/SP811/sec08.html\n\nA force is acceleration times mass.  Weight is the accleration due to gravity times mass.  On the Earth's surface, this is approximately:\n\nWeight = Mass x 9.8 meters/second^2\n\nFor a accurate conversion, you would need to use the acceleration due gravity minus the accelration due to centrifugal force at your exact location.  \n\nThis is why physicists more commonly use mass than weight to describe an object.
468240
Mass is a direct measure of an object's inertia, and the strength of its gravitational pull. More often, we find it easier to say that mass is a measure of quantity. More mass = more interia, so it works out.\n\nWeight, the way we think of it, is a measure of the net downward force an object undergoes when placed in a gravitational field ("down" meaning toward the source of the gravitational force in question). On Earth, weight is a measure of the effect gravity has on an object.\n\nSince more mass = more for gravity to pull, objects with more mass also have more weight (at the same location in the same gravity field), so we generally use weight and mass interchangeably, and this doesn't cause too many problems.
15257
Weight is defined as the force of attration b/w the earth and the object.\nAs we know that the force is defined as:\nF=m*a    (Force = mass * acceleration)\n\nIn our case, this force is the wieght of the body and the acceleration is the acceleration due to gracity i.e g. So the formula becomes:\n\nw = m*g
173277
25 lbs\nThe distinction between mass and weight becomes obvious when we move away from the earth's surface. For example, on the surface of the Moon gravity is only about one sixth as strong as on the surface of the earth. A one kilogram mass is still a one kilogram mass – mass is an intrinsic property of the object. However, the weight of the object – the downwards force due to gravity – is only one sixth of what it is at the surface of the earth; that is, only one sixth of what we would expect one kilogram to weigh.
508636
same mass, same weight
1132748
Mass does two things:\ni) it provides resistance to accelerations\nii) it couples to gravitational fields\n - note that according to the equivalence principle of general relativity these two things could actually be the same thing.\n\nTo measure mass you measure one of those two effects.  For example you strongly accelerate a small particle (eg by strong magnetic field) and measure the velocity it reaches in a given time.  This measures its resistance to acceleration, hence its mass.  Or you measure how it moves in a known gravitational field and infer its mass from that.\n\n\nHope this helps!\nThe Chicken
613586
For calculating weight you will be needing the specific gravity or bulk density of the material it is made of.\nElse you need a weigh balance.
772932
Mass is a measure of inertia and hence greater the mass greater is the inertia.\n The 10kg mass will have the greatest inertia....
169053
They have equal mass because mass does not change depening on where you are the weight would change because weight is a force and is dependent on gravity which in space would be less than on the earth.