Mathematically, density is defined as mass divided by volume: = where ρ is the density, m is the mass, and V is the volume. However, if the mass distribution is not spherical, the gravitational field does depend not only on the densities of the two mass distributions, but also on the geometrical shapes. If two solid planets have equal mass but one is made of iron and the other of rock, the iron planet will be smaller and denser. Source(s): https://shrinkurl.im/a0LAJ. gravity depends hugely on density and your distance from the planet. Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Lv 4. Specific gravity is a relative measure of density, since you are calculating the ratio of a density of an unknown substance to the density of a reference substance (usually water) at a specified temperature and pressure. The density of solids and liquids normally increase with decreasing temperature. Q: Is there a relationship between density and gravity? Then what is the value of R ′ R ? Weight: a measure of gravity on an object. Density is how much matter is packed within an object, which can be changed. Jan 29, 2015 #20 DaveC426913. Answer Save. Introduction. The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume.The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Generally Density of fluid is not much change in slight change in Temperature. Mass does not depend on gravity. According to the SI system of units, the unit of density is kilogram per cubic meter or Kg/m 3. Density is what we normally refer to as “weight” of a fluid. 19,084 2,590. Density is defined as mass per unit volume. This leads to changes in volume, and hence, also in density. A person flying at 9,100 m (30,000 ft) above sea level over mountains will feel more gravity than someone at the same elevation but over the sea. If I travel to the moon, does my mass change? Water has a density of 1 kg/l at 4°C. Does NOT depend on gravity Write a sentence answering: On Earth my mass = 150 lbs and my weight = 150 lbs. Density is a concept with which we are really familiar. Gravity surveys measure the acceleration due to gravity, g. Average value of g at Earth’s surface is 9.80 ms-2. In other words, this gravity correction could significantly be magnified in mountainous regions even if an anomalous density there does not necessary reach the largest values. What changes is the object's weight. How is density calculated? Technically it depends on the density of the fluid, but specific gravity is simply density / density of water, so they both contain the same information. When Temperature is increases Volume of fluids increases. The effects of gravity can depend upon both the size and the mass of a planet. Depends on gravity Mass: amount of stuff or matter in an object. Matter curves spacetime, or does spacetime curve matter? The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. See the other answer and the discussion below for some more details on the math and procedures required to make these calculations. What I'm getting here then is that gravity depends on mass, density and some sort of 'field' that permeates all of everything. Oct 16, 2011 #6 RandyLowe. This is because density changes with temperature and pressure due to properties of intermolecular interactions. Gravity does not depend on density. Improve this answer. Lv 6. The densities of the solids and liquids displayed are given for the standard temperature of $0.0\text{°}\text{C}$ and the densities of solids and liquids depend on the temperature. If the density of the Earth were constant (per the green 'constant density' line), the gravity would just decrease linearly. does the weight lose on the moon depend up on the specific gravity of the object? Gravity is the gravitational pull that is invisible and cannot be touched or changed. Does gravity depends on atmosphere ... With Uranus, its density is 4.3 times lower than Earth's while its radius is 4 times larger. Density. Mass vs. From a great distance the gravitational attraction will be equal (for equal mass). Events such as up thrust are dependent on the density. Since the rocket as a whole may be accelerating, it is convenient to place the reference axis at the center of mass so that any acceleration of the body as a whole has no effect on angular momentum assessed about that axis. What I mean is, not really. A more dense object of a given mass is smaller, so you can get closer to its centre of mass and experience a stronger gravitational force. Section 2: Gravity Surveying. 1 decade ago. Weight. It's the MASS that creates gravity, not density. Bandersnatch said: Gravity doesn't depend on mass only, but also on distance from the source. Although the two terms often are used interchangeably, there is a technical difference between specific gravity and density. The effect of ground elevation depends on the density of the ground (see Slab correction section). I have a question, probably me being stupid in my tiredness, but what is the relation to and object's density to its gravity if mass increases and volume stays the same? 0 0. Gravity does not depend on density. shows the density of water in various phases and temperature. So, knowing the surface gravity of Earth, and the radius of the Earth, we could only calculate it's total mass, and from that, the average density of the planet. Accordingly, one is free to pick a reference point that makes for an easy explanation. 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