The cylindrical tube of spray pump has a cross-section of 8${\rm{c}}{{\rm{m}}^2}$, one end of which has 40 fine holes each of area ${10^{ - 8}}{{\rm{m}}^2}$. If liquid flows inside the tube with a speed of $0.15{\rm{m\,\, mi}}{{\rm{n}}^{ - 1}}$, the speed with which the liquid is ejected through the hole is

$0.05{\rm{m}}{{\rm{s}}^{ - 1}}$

NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

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Application +4 | -1

The cylindrical tube of spray pump has a cross-section of 8

\mathrm{c}{\mathrm{m}^2}

, one end of which has 40 fine holes each of area

{10^{ - 8}}{\mathrm{m}^2}

. If liquid flows inside the tube with a speed of

0.15\mathrm{m\,\, mi}{\mathrm{n}^{ - 1}}

, the speed with which the liquid is ejected through the hole is

View answer and explanation

Correct option: B

5\mathrm{m}{\mathrm{s}^{ - 1}}

Option B (

5\mathrm{m}{\mathrm{s}^{ - 1}}

) is correct because the speed is calculated using the equation of continuity, equating the flow rate in the tube to the total flow rate through the holes.

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