Tag: measurement of area, volume and density

 In a given system of units, the ratio of unit of volume to that of its area gives 

A cubic metre of water at $0^o$C is solidified into ice, density of ice is $0.96$ of water at $0^o$C. Which of the following deductions are true?
$1$. Water expands when solidified.
$2$. Ice will float in water at $0^o$C with half its volume above the surface.
$3$. Density of all liquids are higher than its density when solidified.

A cubical block of wood of specific gravity $0.5$ and a chunk of concrete of specific gravity $2.5$ are fastened together. The ratio of mass of wood to the mass of concert which makes the combination to float with its entire volume submerged in water is 

There are $n\ sets$ of real numbers. In every set there are four real numbers in AP. Such that the square of the last term is equal to the sum of the square of the first three terms. Then: -

Four  positive charges $ ( 2 \sqrt 2-1 )Q $ are arranged at corner of square . another charge q is placed at the centre of the square. resultant force acting on each corner is zero if q is :

A public park, in the form of a square, has an area of $(100 \pm 0.2 )m^2 $ .The side of park is :

The mass of 0.5 litre of hydrogen gas at NTP will be approximately

The space occupied by the object is called ....................... .

Mass per unit volume is ....................... .

Express $1  ml $ in $m^3$.