Advertisements
Advertisements
Question
State the S.I. and C.G.S. units of density. How are they inte related ?
Solution
The S.I. unit of mass is kilogram (symbol kg) and of volume is
cubic metre (symbol m3). Therefore S.I. unit of density is kg/m3
or kg m-3.
The C.G.S. unit of mass is gram (symbol g) and of volume is cubic centimetre (symbol cm3). Therefore the C.G.S. unit of
density is g/cm3 or g cm-3.
Relationship between kg `"m"^-3` and g `"cm"^-3`
1 kg = 1000 g
or 1 g = `1/1000` kg
and 1 `"m"^3 = (100 "cm")^3`
= 100 × 100× 100 `cm^3`
= 10,00,000 `cm^3`
or 1 `"cm"^3 = 1/1000000 "m"^3`
now 1 g `"cm"^-3 = (1 "g")/(1 "cm"^3)`
=`(1/1000 "kg")/(1/1000000 "m"^3)`
= `1000000/1000 "kg" "m"^-3`
= 1,000 kg `"m"^-3`
Thus , 1 g `"cm"^-3 = 1.000 "kg" "m"^-3`
APPEARS IN
RELATED QUESTIONS
Write true or false for a given statement
cm2 is a smaller unit of area than m2.
Write true or false for a given statement.
The S.I. unit of speed is ms-1.
Fill in the blank
The volume of an irregular solid is determined by the method of _____
Fill in the blank
The S.I. unit of density is _______
Select the correct alternative
A metallic piece displaces water of volume 15 ml. The volume of piece is :
State two smaller units of volume. How are they related to the S.I. unit?
Volume of irregularly shaped objects are measured using the law of ______.
Distinguish between the volume of liquid and capacity of a container.
The unit of volume is ______.
Questions based on Higher Order Thinking Skills:
|
There are three spheres A, B, C as shown below. Spheres A and B are made of the same material. Sphere C is made of a different material. Spheres A and C have equal radii. The radius of sphere B is half that of A. The density of A is double that of C.
|
Now answer the following questions.
- Find the ratio of masses of spheres A and B.
- Find the ratio of volumes of spheres A and B.
- Find the ratio of masses of spheres A and C.
