What is difference between density & specific gravity?
Density is the amount of matter in a given volume - and defined as mass per unit volume; it has the SI unit kg/m³ or g/cm³ and is an absolute quantity. Specific gravity is the ratio of a material's density with that of water at 4 °C and is therefore a relative quantity with no units.(Density of water varies with its temperature. It attains maximum density of 1 g/cm³- at 4°C. It is precisely 0.999972 g/cm³ usually rounded off to 1 g/cm³. For comparison, at freezing point of 0°C the density is 0.9998395 g/cm³ and at room temperature of 25°C the density is 0.9970479 g/cm³ and at boiling point of 100°C the density is 0.9584 g/cm³ only.)What Is the Density of Water?
What is the specific gravity of mild steel?
Specific gravity of an object is the ratio of density of that object to that of a reference substance. The specific gravity can tell us, based on its value, if the object will sink or float in our reference substance. Generally, the reference substance is water which has a density of [math]1 g/cm^3[/math] at [math]4^oC[/math].Specific gravity of mild steel = (density of mild steel)/(density of water)Usually, the density of mild steel is 7.85[math] g/cm^3[/math]. But, depending on the alloying elements added, this can vary between 7.75 and 8.05[math] g/cm^3[/math].So, according to the formula mentioned above, the specific gravity of mild steel may vary between 7.75 and 8.05[math]g/cm^3[/math], at [math]4^oC[/math].It must also be noted that the density of water decreases with the increase of temperature above [math]4^o[/math]C, as shown below:So, according to the formula of specific gravity, the specific gravity of mild steel with respect to water increases with the increase in temperature above [math]4^o[/math]C.Sources:http://www.thyssenkruppaerospace...http://study.com/academy/lesson/...
What are some unique characteristics of the specific density of gold?
Density = mass / volume in grams/cm³ - Gold = 19.30 gm/cm³Specific Gravity = density of material / density of water - Gold = 19.3Other than the 'value' of Gold, the quality which is perhaps most important to the prospector is its density. Gold is extremely dense, making it one of the heaviest of all metals. The specific gravity of gold is 19.30. Osium and Iridium are the other metals that have a higher specific gravity than gold. Gold is around ten times heavier than the rock which it is commonly associated with when gold is found in hard-rock form. It is this quality of gold, having a superior weight factor over the other materials usually found along with it, that makes gold recovery methods relatively easier.Other than this, I cannot think of any other unique characteristics of the density of Au.
What is the specific weight of aluminium?
Specific weight is defined as mass density multiplied by the acceleration of gravity.Unalloyed aluminium has a density ρ = 2.70 g/cm^3The acceleration of gravity is g = 9.81 m/s^2Thus γ = ρg = 26.5kN/m^3(calculation to 3 significant digits)See also: Specific weight - Wikipedia
A 4.7 kg solid sphere, made of metal whose density is 4000 kg/m3, is suspended by a cord. The density of water?
A 4.7 kg solid sphere, made of metal whose density is 4000 kg/m^3, is suspended by a cord. The density of water is When the sphere is immersed in water, the tension in the cord is closest to:Question options: 46 N 52 N 40 N 35 N 58 N A compressed gas with a total mass of 107 kg is stored in a spherical container which has a radius of 0.521 m. What is the density of the compressed gas?Question options: 110 kg/m3 161 kg/m3 134 kg/m3 181 kg/m3
How do you calculate the density of a cylinder?
where d Density, M mass and V volume of the substance.It is a scalar quantity.Example:mass = 5.0395diameter = 0.53height = 4.4radius = 0.53 / 2 radius = 0.265radius = 0.265volume = PI * 0.265 * 0.265 * 4.4 volume = 0.9711So the volume is 0.9711density = 5.0395 / 0.9711 density = 5.1895So the density is 5.1895
A stone weighs 200 N in air and 120 N in water. What is the specific gravity (SG) of the stone?
Specific gravity is Weight of the item (in air) / Weight of water displaced when the item is placed in water = the weight in air/(weight in air - weight in water)200N/(200N - 120N) = 200N/80N = 100/40 = 10/4 = 5/2 = 2.5 (which incidentally is quite possible for a stone. The person who asked the question came up with reasonably realistic numbers).
How is relative density calculated?
relative density ( also known as specific gravity ) is calculates in liquids and solids compared to water ( water having a specific gravity of 1 ) and in gasses compaired to Air ( again having a specific gravity of 1 ) this is because air is the most abundant mixture on eart and water is the most abundant compoud on earth. e.g natural gasa has a S.g. of .55 this means it is about half the weight of air.
Radioactive Decay...?
ooo lol i just learned that in science half-life is the amount of time it takes for half the nuclei in a sample of a radioactive isotope (unstable atom of element) to decay. an example is element x. the half-life of element x is 1 billion years. you have a 100 grams sample of element x. after 1 billion years, half of the element x sample would have decayed into something else (so 50 grams of element x has not decayed). and after 2 billion years, there would only be 25% of the original sample left (25 grams not decayed). after 3 billion years, there would only be 12.5% of the original sample left (12.5 grams not decayed). and so on... every half-life reduces the amount of the sample that is left by 50%. if there are radioactive elements in something, whether it be a fossil of an organism or an ancient rock, the half-life of the element can be used to find out the age of the fossil or rock it's found in (by seeing what % of the original amount is left). i won't describe the formula, but it can be found online if you're interested in knowing it. ^^ this was kinda confusing when i learned it too... hope you get it now!