Explain the statement clearly

unitsandmeasurement
cbse

#1

Explain the statement clearly “To call a dimensional quantity large or small is meaningless without specifying a standard for comparison”. In view of this, reframe the following statements wherever necessary
(i) Atoms are very small objects.
(ii) A jet plane moves with great speed.
(iii) The mass of Jupiter is very large.
(iv) The air inside this room contains a large number
of molecules. .
(v) A proton is much more massive than an electron.
(vi) The speed of sound is much smaller than the
speed of light.


#2

The statement is true. Any dimensional physical quantity can be called large or small by specifying a standard for comparison. For example, the mass of a boy is 40 kg, which is very small in comparison to the mass of the earth (6 X${{10}^{24}}$ kg) but very large in comparison to the mass of an electron (9.1 X${{10}^{-31}}$ kg).
(I) The size of an atom is very small in comparison to the size of a sugar cube.
(it) A jet plane moves fester than a superfast train.
(iii) The mass of Jupiter is very large as compared to the mass of Uranus.
(iv) The air inside this room contains large number of molecules than in one mole of air.
(v) The statement is already correct.
(vi) The statement is already correct