What is SI unit of viscosity coefficient...

What is `SI` unit of viscosity coefficient `(eta)` ?

Pascal

`Nsm^(-2)`

`Km^(-2)s`

`Nm^(-2)`

Text Solution

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The correct Answer is:

The SI unit of viscosity coefficient `(eta)` is `Nm^(-2)s` or `Nsm^(-2)`.
`{:("As we know that,",f=eta A (dv)/(dx)),("where,",f="force"),(,eta="viscosity coefficient"),(,(dv)/(dx)="velocity gradient"):}`
Substitute SI units of `f=N, dx=m, A=m^(2)` and `v=ms^(-1)`
in above equation, to get,
`eta=(Nxxm)/(m^(2)xxms^(-1))=Nm^(-2)s`
Hence, the si unit of `eta=` is `nsm^(-2)`

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What is SI units of viscosity coefficient (eta) ?

Pascal

Ns `m^(-2)`

`km^(-2)`s

N `m^(-2)`

The SI unit of viscosity coefficient is

`N s m^(-2)`

`Pa s`

`kg m^(-1) s^(-1)`

All of these

What is the SI unit of denisty?

g `cm^(-3)`

`g m^(-3)`

`kg m^(-3)`

`kg cm^(-3)`