Density and Specific Gravity
The specific gravity (SG) is calculated from weight in air divided by loss of weight in water, expressed in units of grams per cubic centimetre. The specific gravity of most minerals ranges from 1.5 up to 19.5.
(CHANNEL FAIZAN BHAI GHAZI)
Two properties of minerals that can be expressed in numbers are hardness and specific gravity. Hardness is usually determined using the Mohs scale and is expressed as a number between 1 (softest) and 10 (hardest). Specific gravity is the ratio of a mineral's density compared to the density of water and is expressed as a number.
what are two physical properties about minerals
Examples: chemical reactivity, toxicity, flammability, stability.
Numbers that can be expressed as a ratio are called rational numbers.
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Expressed in numbers, this is equal to 6,400,002.
rational numbers
Rational numbers can be expressed as a ratio of two integers, irrational numbers cannot be expressed in that way.
irrational numbers
These are the numbers which cannot be expressed as ratios of two integers.
Numbers that can be expressed as fractions consisting of two integers are rational numbers. sqrt(2)/3 or pi/4 are fractions but they are not rational.
Such numbers are called rational numbers.