explain the difference between weight and mass.?
829568
Mass is the amount of material in an object. Mass stays the same no matter what force is acting on the object. This makes mass different from weight, which depends on both the amount of mass and the amount of gravity
659813
AS THEY TRAVEL from E to M, their weight is zero except when the rocket motors are firing.  Weight is defined as the force applied to a mass by another particular mass in the ABSENCE of acceleration.  Ergo, they weigh differently on M than E because of the difference in the masses of E & M AND the radius at the surface of each body in accordance with the formula given above.\n\nAs I remember, the ratio is about 1/6 for gm/ge at the surface of each.
1095815
Mass is the amount of matter present in a body and is an intrinsic property of the body. Mass of an object remains the same always at any place.\n\nWeight on the other hand is the force which a given mass feels due to the gravity at its place. Weight is measured in units of Force like Newton (which is the SI unit of Force).\nIf your mass is 60 kgs then your weight is approximately 60 x 10 = 600 Newtons. This is because\n\nForce = mass x acceleration (From Newton's second Law)\n\nThus, weight = mass x acceleration due to gravity
374421
mass=density over volume\n\n=)
207775
Mass is only one variable in an equation... what are you trying to relate it to?\n\nweight = mass x gravity would be one equation for mass...
1001813
Mass is a basic aspect of matter. Density is derived.\nA certain amount of mass in a certain volume gives a certain density.\nMany people confuse weight and mass. Mass is more basic. To have weight, you must have mass in a gravitational field. The gravitational field comes from another, separate, mass.\nAn apple has weight in the gravitational field of the earth (and the mass of the apple exerts a gravitational field as well, but much less).\nMass is best quantified (expressed through numbers) through inertia, the resistence to change of movement. The more something resists change in movement, the more mass it has.\nThe same size ball of lead will resist change in movement (be harder to throw) than if made of balsa wood. The resisted change in movement may not be a change in speed, but may be a change in direction, or a combination of the two.\nYou can tie a rock on a string, and twirl it in a circle at a constant speed, and since it's direction is changing, it's movement is changing (change in movement is acceleration). The pull on the string is the force of acceleration. If you cut the string, the rock flies away in a straight line.\nA more massive rock would exert more force on the string. The string will be tighter. This is the property of mass (inertia).\nIce floats on water, although it is made of water. It floats because the density of ice is less than water. It floats because after it displaces (pushes out of the way) it's weight (weight and mass are close for this purpose), it still has some volume left over that sticks out of the surface of the water. A steel cube the same size would sink, because after it had displaced it's volume in water, it would still weigh more than the water. Things that float are said to have positive bouyancy (ice). The water still lifts the steel, but not enough to float (negative bouyancy). A life preserver makes sure a person has positive bouyancey (floats) so he won't drown.\nThe steel is more dense than water or ice.\nVolume is length times width times height.\nIf you cut 6 one inch squares from paper, place one down, tape the edge of one square to each edge of the square lying down, bring all four squares up until they meet, tape the edges to fasten them, and place the other square on top, you have a volume of one cubic inch. Make the squares a foot, and you have a cubic foot, or a cubic what ever you make the square's sides. This is a cube. Volume is cubic in measurement.\nThe more mass there is  that cube, spread uniformly so that there is not a lot of mass in one spot and little in another, but the same amount, the more dense the cube is.\nLead is denser than steel, because a cubic inch (Or foot) of lead weighs more and is more massive than a cubic inch (or foot) of steel.\nLead is denser than water, water is denser than air,\nair is denser than vacuum (the absence of matter).\nHydrogen or helium balloons rise in air because they are lighter, less massive, than the same volume of air as the balloon would be, making them positively bouyant (they float in air). They displace (push aside) more than their weight of air for the same volume.\nSo mass is a basic measurement (quantity), and density is derived from mass of a certain volume, and is known as a derived quantity. \nDensity = mass/ unit volume (unit meaning one, as in one centimeter, one cubic centimeter or one cubic inch or one cubic foot in the case of volume). Mass would be in grams or kilograms (one thousand grams or 2.2 pounds). 454 grams make 1 pound. Grams are rather small.\nFor instance: 5 grams/cubic centimeter       or\n5 grams per (one)cubic centimeter      is the density. One is understood, not stated. This is how density is read (how you say it).\nI hope this helps.\nFor extra, there are a lot of math and physics pages at: http://www.khake.com/page47.html\nthat may interest you.
820799
Weight. "An object goes as deep as the amount of mass it can move upwards", so that's why... the more salt, the heavier the water and less the egg can descend.
96297
Weight is the force acting downwards and support is the force which is acting upwards (A.K.A Normal Force). In most cases if the support does not undergo buckling or breaking when weight is applied, their magniture will be the same.\nMag of Weight = Mag of Normal force.\n\nBut the difference is they act on different objects. i.e. weight acts on the supporting plane and the normal force acts on the object that is put on the support.\n\n-->  p  <--\n\nDanEelectrician@yahoo.com
425701
No. You can understand the difference by going back to its source: the Newton's Second Law.\n\nF = ma\n\nThe weight of an object is the attractive force (F) exercised by the Earth on that object.\n\nAs the above equation shows, the mass (m) of an object is the constant of proportionality that links any force exercised on the object with the consequent acceleration (a).\n\nSo you see that the weight is a special case of force, that you have when a is the Earth's gravity acceleration. \n\nNow suppose you bring the same object on another planet, say Mars, where the gravity acceleration is different. Its mass doesn't change, but the weight does!\n\nThe weight of an object is an Earth accident, while its mass is a more fundamental concept because its value remains constant (at least within the non-relativistic limit, but this is another story).
142999
Momentum refers to the quantity of the motion that the object have.....It is mainly " MASS IN MOTION "..It depends on mass and velocity....momentum = mass * velocity...or momentum(P) = mass(M) * velocity(V)....Its is a vector quantity...
957725
kg is a measure of mass and not weight.  Though, it often gets confused.  The mass of a person does not change unless he consume something or eject something from his body.  His mass would not change wether the elevator goes up, down or sideways.  Depends on what the question is looking for.  The most accurate answer should be: \n\n65kg x (9.81+2)m/s^2 = 767.65 N (newton).\n\nThe old weight of the person is:\n\n65kg x 9.81 m/s^2 =637.65 N\n\nIt would be ridiculous if the question asked for the weight in pounds, but here is a conversion:\n\n767.65 N x 0.2248 N/lbf = 172.56 lbf (as in pound-force, which is different from pound-mas (lbm), the common concept of measure in weight most of us are familiar with, 1 lbf = 1 lbm x 32.2 ft/s^2 )\n\nNow that I have confused everyone.  I just wonder if a physics teacher can explain it any better? lol.\n\n\nXR
298529
If you know the density of the material, you can measure it's volume.  D = M / V.  Therefore, the mass equals the density of the object times the volume.  The weight of the material is its mass times gravity.
451020
Weight is define by your mass times the acceleration due to gravity where you are.  So you mass is the same anywhere in the universe but your weight will be effected by where you are.  Now what is weight measured in?  This is dependent on the units you use for mass and acceleration.  Using kilograms for mass and m/s^2 for acceleration you will get newtons.  Use slugs and ft/s^2 you get a pound-force.  Using a standard equivalence between pounds and kilograms you get kilogram-force.  Many people think kilograms is a measure of weight when it really is not, its kilograms-force.  There should be somewhere on most scales that will show a lbf or kgf instead of just lb or kg.  Newtons is the standard SI unit of measure though.\n\nEdit: when i say acceleration, i mean acceleration due to gravity.  Weight *is* a unit of force.\n\nhoarp001:  Weight is a unit of force, all the units you put there are units of mass, not weight.\n\nzeno : "From other experiments, we know that g, or acceleration by free fall is actually an acceleration of 9.8N at sea level"  G is acceleration due to gravity.  According to your "9.8N" your mass would be a kg*N, not newtons.  Pay attention to your units, especially since he was asking a unit question.  Standard SI would be 9.8 meters / second^2, CGS would be 980 centimeters / second^2.  If using standard engineering units, it would be 32 feet / second^2.  Bascially anything that is a length per time ^2.
229095
mass doesn't change. Only weight changes because weight is mass times the acceleration due to gravity.\n\nWt=mg
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.
279746
A pound of fat weighs a pound.\nA pound of muscle weighs a pound.\nBUT...a pound of muscle takes up LESS SPACE than a pound of fat.\n"A pound of fat has more than two times the volume of a pound of muscle. A 150 pound lady that has only 25 pounds of fat on her body will fit easily in a dress that a 135 pound lady with 50 pounds of fat cannot possibly fit into."
99522
Your question can be answered with the following quote.  Basically the difference is in the fact that gravitational acceleration is proporationally the the two objects being studied, whereas inertial aceleration refers cheifly to a single object being accelerated without regard to another mass.\n\nQuestion\n\nWhat is the difference between the inertial and gravitational mass?\n\nAsked by: Raminder\n\nAnswer\n\n1) Inertial mass. This is mainly defined by Newton's law, the all-too-famous F = ma, which states that when a force F is applied to an object, it will accelerate proportionally, and that constant of proportion is the mass of that object. In very concrete terms, to determine the inertial mass, you apply a force of F Newtons to an object, measure the acceleration in m/s2, and F/a will give you the inertial mass m in kilograms. \n\n2) Gravitational mass. This is defined by the force of gravitation, which states that there is a gravitational force between any pair of objects, which is given by \n\nF = G m1 m2/r2 \n\nwhere G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them. This, in effect defines the gravitational mass of an object. \n\nAs it turns out, these two masses are equal to each other as far as we can measure. Also, the equivalence of these two masses is why all objects fall at the same rate on earth.