# Solution - Explain Statement to Call a Dimensional Quantity Large Or Small is Meaningless Without Standard for Comparison - International System of Units

Account
Register

Share

Books Shortlist
Your shortlist is empty

#### Question

Explain this 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:

(a) atoms are very small objects

(b) a jet plane moves with great speed

(c) the mass of Jupiter is very large

(d) the air inside this room contains a large number of molecules

(e) a proton is much more massive than an electron

(f) the speed of sound is much smaller than the speed of light.

#### Solution

You need to to view the solution
Is there an error in this question or solution?

#### Similar questions

A famous relation in physics relates ‘moving mass’ to the ‘rest mass’ m0 of a particle in terms of its speed and the speed of light, c. (This relation first arose as a consequence of special relativity due to Albert Einstein). A boy recalls the relation almost correctly but forgets where to put the constant c. He writes:

m = m_0/(1-v^2)^(1/2)

Guess where to put the missing c.

view solution

Fill in the blanks

The volume of a cube of side 1 cm is equal to.....m3

view solution

A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?

view solution

A calorie is a unit of heat or energy and it equals about 4.2 J where 1J = 1 kg m2s–2. Suppose we employ a system of units in which the unit of mass equals α kg, the unit of length equals β m, the unit of time is γ s. Show that a calorie has a magnitude 4.2 α–1 β–2 γin terms of the new units.

view solution

Fill in the blanks

The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ... (mm)2

view solution

S