Numford

Properties of matterClass 11, Mechanical Properties of Fluids

Dimensional formula of Volume flow rate

[L3 T-1]

SymbolQ SI unitcubic metre per second (m³/s)

Volume passing a point per unit time, area times speed. The equation of continuity keeps it steady.

Derivation

How to get the dimensional formula of volume flow rate

  1. Start from the definition: volume flow rate = volume / time.
  2. volume = length3, so volume is [L]3 = [L3].
  3. Put in the dimension of each part: [L3] / [T].
  4. Add the powers of each base quantity: [L3 T-1].
Practice

Three questions on volume flow rate

1Which is the dimensional formula of volume flow rate?

2What is the SI unit of volume flow rate?

3Do volume flow rate and Reynolds number have the same dimensions?

Questions

Volume flow rate: quick answers

What is the dimensional formula of volume flow rate?

The dimensional formula of volume flow rate is [L³ T⁻¹]. It comes from volume flow rate = volume / time.

What is the SI unit of volume flow rate?

The SI unit of volume flow rate is the cubic metre per second (m³/s).

Is volume flow rate dimensionless?

No. Volume flow rate has the dimensions [L³ T⁻¹].

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