Question

There are some assumptions and statements related with the linearized wave equation. Please select all true...

There are some assumptions and statements related with the linearized wave equation. Please select all true statements.

1)The process (in which wave is transmitted through the fluid) is adiabatic.

2)The magnitude of acoustic pressure has to be higher than the ambient pressure.

3)The force related with viscosity is much smaller than other forces.

4)Fluid has to be incompressible.

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Answer #1

The assumptions formulated in developing the linearized wave equation are:

The force associated with viscosity is less compared to other forces. The fluid is ideal, hence it lacks viscosity.

Fluid has to be incompressible. The fluid is homogeneous and hence is not compressible, therefore, the density ? is a constant.

Hence (3) and (4) are correct.

(1) is incorrect statement as there is a heat tranfer process throughout the system. So, the process is non-adiabatic.

(2) is incorrect statement as the pressure remains uniform and constant.

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