Question

An L-shaped tube with a small orifice is held in a water stream as shown in the figure. The upper end of the tube is $10.6cm$ above the surface of water. What will be the height of the jet of water coming from the orifice?

Velocity of water stream is $2.45m/s$.

• A. Zero
• B. $20.0cm$
• C. $10.6cm$
• D. $40.0cm$

Answer 1

Answer: (B)

According to Bernoulli's theorem, $h=\frac{v^2}{2g}$
$\Rightarrow h=\frac{(2.45{)}^2}{2\times 10}=0.314=31.4cm$
$\therefore$ Height of jet coming from orifice $=31.4-10.6$
$=20.8cm$