Question

5. With what velocity does water flow
out of an orifice in a tank with gauge
pressure 4 x 105 N/m² before the flow
starts? Density of water = 1000 kg/m..​

Answer 1

Here,P=3×10

5

Nm

−2

,

ρ=1000kgm

−3

,

g=9.8ms

−2

As P=hρg

∴h=

ρg

P

=

1000×9.8

3×10

5

m

Velocity of efflux,

v=

2gh

=

1000×9.8

2×9.8×3×10

5

=

600

=24.495ms

−1

=24.5ms

−1

Answer 2

Answer:

28.28 m/s

Explanation:

P= 4×10^5Nm^−2

ρ= 1000kgm^−3

g= 10ms^−2

Soln:

P = hρg

h = P/ρg

= 4 × 10⁵/1000 × 10

v = √2gh

= √2 × 10 × h

= 28.28 m/s