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For dimensional consistency, firstly, I would expect the number '4' to be dimensionfull. Additionally, whether the angle is to be taken in radians or in degrees depends on where this equation came from. If I venture a guess, then I suppose at some point you differentiated a relation between $y$ and $\theta$. In that case, the relation you started of with ...


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Sometimes a picture tells a thousand words... It all depends what question you ask Wolfram Alpha: Floating point arithmetic leads to rounding errors. Non SI units are rarely defined precisely (an exception is the inch which is exactly 25.4 mm - and thus other derived units of length). But getting back to the "what is the value" - we should go with ...


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1 PSI is 0.0689475728 bar which means that 1 bar is 14.50377397 PSI. Thus, $$ \frac{6894.7573\,{\rm bar}}{1}\times\frac{14.50377397 \,\rm PSI}{1\,\rm bar}=100000.0002900755\,\rm PSI $$ which is slightly off from both sources. NIST says that 1 Bar = $10^5$ Pascal 1 PSI = $6.894757\times10^3$ Pascal Thus, $$ 6.894757\times10^{-2}\,{\rm ...



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