What Is the Correct Unit for a in the Equation P + av^2 = b?

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SUMMARY

The equation P + av² = b is dimensionally correct, where P represents pressure and v represents velocity. The unit of 'a' is determined to be similar to density, as all terms in the equation must share the same units. The variable 'b' is inferred to have units of pressure, although its status as a constant is not explicitly defined in the discussion. Therefore, the equation maintains dimensional consistency across its components.

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Homework Statement



The equation P+av2=b is dimensionally correct. P and v represent pressure and velocity respectively. The unit of ''a'' is similar to...?

The answer provided is density...

Homework Equations





The Attempt at a Solution



In the question... it doesn't state that what is ''b'', so should i assume that it is a constant? or there's a proper solution? Please enlighten me...
 
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There is no telling if b is constant or not.
All you can say is that it has the units of pressure, so it is "similar" to pressure.
 
Delphi51 said:
There is no telling if b is constant or not.
All you can say is that it has the units of pressure, so it is "similar" to pressure.

How do you know that ''b'' has a unit of pressure in the first place? Thanks...
 
The formula P+av²=b has three terms. All of them must have the same units or dimensions because you can't add kg to meters. P is in units of pressure, so av² and b must also be in units of pressure.
 

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