Advertisements
Advertisements
Question
Name the S.I. unit of density. How is it related to g Cm-3?
Advertisements
Solution
S.I. unit of density is kg M-3 In C.GS. system unit of mass is g and unit of volume is Cm3, so CGS unit of density is g Cm-3 (gram per cubic centimetre)
Relationship between S.I. and C.GS. units
1kg `m^-3`=`(1 kg)/(1m^3`=`(1000g)/(100 cm)^3`
=`1/1000` g `cm^-3`
thus,
1 kg `m^-3`=`10^-3`g_`cm^-3`
or 1 g `cm^-3`= 1000kg `m^-3`
APPEARS IN
RELATED QUESTIONS
What is the other name of buoyant force ?
A boy get into a floating boat.
What happens to the buoyant force on the boat ?
A piece of wood floats on water. The buoyant force on wood will be
What is the unit of relative density?
Explain the meaning of the statement
‘Relative density of aluminium is 2.7’.
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
In what direction and at what point does the buoyant force on a body due to a liquid act?
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
The blood pressure reading of a patient is recorded 160/100. Express the lower pressure in SI units.
[Take density of mercury as 13.6 × 103 kgm−3 and the value of ‘g’ as 10 ms−2]
