Originally Posted by babasri09

I want to know, what is the reason we use the term specific gravity,instead of density for liquids?

i don't want the definition of specific gravity.

I don't use specific gravity, I use density

The difference is only moving the decimal point around if you work in metric

So what you use is totally trivial

(Oh, I do like it now we have all these smilies ) ■

Dear babasri09,

Have a look at:

http://en.wikipedia.org/wiki/Relativedensity

Specific gravity is measured by a hydrometer and a pycnometer.

These instruments measure the density in relation to a specific (for the experiment) used liquid F.i. oil for cement, which would react with water)

After the experiment, the real density can be calculated on basis of the real density of the used liquid.

That is all.

Specific gravity (or relative density) is only used in bulk conveying when the material density of a product has to be measured.

Have a nice day

Teus ■

Specific Gravity is a non-dimensional term and therefore useful for those who still use the archaic avoirdupois system of units and similar exercises in mental arithmetic. ■

Originally Posted by louispanjang

the archaic avoirdupois system of units and similar exercises in mental arithmetic.

16 ozs, 1 pound

14 pounds, 1 stone

2 stones, 1 quarter

4 quaters, 1 hundredweight

20 hunderdweight, 1 ton

Nothing wrong with that, sorts the men from the boys ■

Originally Posted by designer

16 ozs, 1 pound

14 pounds, 1 stone

2 stones, 1 quarter

4 quaters, 1 hundredweight

20 hunderdweight, 1 ton

Nothing wrong with that, sorts the men from the boys

I will have to keep this around for quotes. ■

Designer is obviously a product of rote learning. Do you remember the units of measure as well?

Michael Reid. ■

How many bushels in a calderkin, how many calderkins in a room and how many litres in a barrel?

Remember the old scam when the gold price was floated in the early 70's and some Jack the Lads were flogging 'genuine' Kruger Rands weighing one ounce for a few bob below the regular price. The gold was there right enough but the official price of gold was for a troy ounce which is a few grams heavier than the avoirdupois ounce which Jack the Lad was touting; and perfectly legally.

"i've got you over 621 litres!" doesn't sound right though. Maybe it's a troy barrel.■

Originally Posted by Michael Reid

Designer is obviously a product of rote learning. Do you remember the units of measure as well?

Michael Reid.

LENGTH

12 inches, 1 foot

3 feet, 1 yard

22 yards, 1 chain

10 chains, 1 furlong

8 furlongs, 1 mile

NB,

1 chain, 100 links

25 links, 1 rod, pole or perch

VOLUME

4 gills, 1 pint

2 pints, 1 quart

4 quarts, 1 gallon

2 gallons, 1 peck

4 pecks, 1 bushel

Money (proper money)

4 farthings, 1 penny

12 pennies, 1 shilling

5 shillings, 1 crown

4 crowns, 1 pound

NB,

1 guinea, 1 pound 1 shilling

Oh how it all comes back.......

(learnt at primary school in the 1950's) ■

We use specific gravity to show what specific gravity is required to be compatible with operation of our float switches.

Water has a SG of 1, our floats have for example 0.7 which means they float in water. ■