what is the specific gravity?
is it have any unit?
how can we explain it in laymen way and technical/detail way
2006-11-01 14:51:56 · 1 answers · asked by MTT 1 in Science & Mathematics ➔ Physics
The specific gravity of a substance is the substance's density relative to the density of water.
The density of the substance is in mass units per unit volume.
The density of water is in the same units.
So the specific gravity (density divided by density) is a pure number. That is, it has no units.
Incidentally mach numbers also have no units. (They are the speed of an object divided by the speed of sound.)
And "radians" sound like they're units, but they too are pure numbers. They are the length of an arc (in distance units) divided by the radius (also in distance units).
2006-11-01 14:59:42 · answer #1 · answered by actuator 5 · 0⤊ 0⤋
The specific gravity is the ratio of the density of a solid or liquid divided by the density of water at a defined temperature. It has no units.
The temperature is defined so it can be, for example, 4 C or 20 C or 25 C.
2006-11-01 14:58:36 · answer #2 · answered by Dr. J. 6 · 0⤊ 0⤋