The volumetric flow rate at the entrance $($per meter depth into the plane of the image$)$ is $12\mathrm{.}0\frac{m^2}{s}$ and the pressure difference $p_{\text{e}\text{x}\text{i}\text{t}}-p_{\text{e}\text{n}\text{t}\text{r}\text{a}\text{n}\text{c}\text{e}}=150$kPa.

What is the expansion angle in degrees?

$=$

A water diffuser is constructed like that in the figure below.

The volumetric flow rate at the entrance $($per meter depth into the plane of the image$)$ is $12\mathrm{.}0\frac{m^2}{s}$ and the pressure difference

$p_{\text{e}\text{x}\text{i}\text{t}}-p_{\text{e}\text{n}\text{t}\text{r}\text{a}\text{n}\text{c}\text{e}}=150$kPa.

What is the expansion angle in degrees?

$=$