Four glass cylinders A, B, C and D of same length 25 cm and same diameter are taken and filled with water up to 20 cm. Then holes are made in A at 5 cm, in B at 8 cm, in C at 10 cm, and in D at 12 cm for the bottom of each cylinder. In which cylinder will the water coming out of the hole travel the farthest?

A
B
C
D

LohaHridoy

6 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 1 : A

Concept :

Pressure

It is the amount of force that is exerted on the surface.
Gravity causes pressure naturally.
Water pressure is the force created by the weight of water.
Water pressure can push water through pipes and hoses.

The formula for water pressure is :

Water pressure= p g h

p = density of water in kg.m-3
g = gravitational force in 9.81 m.s-2
h = height in m
SI unit of pressure is Pascal (Pa)

Explanation :

In the four glass cylinders A, B, C, D we observe that :

The stream coming out from cylinder D i.e.12 cm hole land nearest to the cylinder.
The stream coming out from cylinder A i.e. 5 cm hole land farthest to the cylinder.

This phenomenon is created by different water pressure at each hole.

Water pressure is the force applied from the water above to the water below.
Because this force comes from the weight of the water, the water at the bottom receives the most water pressure.
High water pressure pushes the water out through the hole the strongest and therefore the stream shoots the farthest.

[ alt="F1 Savita 25-4-22 Teaching D2" src="//storage.googleapis.com/tb-img/production/22/04/F1_Savita_25-4-22_Teaching_D2.png" style="height: 389px; width: 431px;">

Fig: Water pressure increases with depth

Therefore the correct answer is option is (1).

6 views Answered 2022-09-04 04:29

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