Page 11 - 1202 Question Bank Physics Form 5

12. Diagram 10 shows a container with water. 17. The equipment commonly used to read altitude
above sea level is basically a
A Aneroid barometer
B Fortin barometer
C Bourdon gauge
D mercury manometer

18. Diagram 11 shows a tube with mercury at sea
X Y Z
level.
Diagram 10
Vacuum
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Which comparison of water pressure at points
X, Y and Z is true?
A P  P  P
X Y Z
B P = P  P h mm
X Y Z
C P = P = P P atm
X Y Z
D P  P = P
X Y Z
Mercury
13. Dams are built with the bottom being thicker
than the top. What is the reason for doing so?
Diagram 11
A Water pressure increases with depth
B The deeper the water, the colder it is What is the value of h?
C The density of water is directly proportional A 760 mm
to the depth of water B 800 mm
D The size of water molecules increases with C 100 cm
the depth of water D 120 cm
14. What is the force due to water pressure on a fish 19. Diagram 12 shows two turtles.

with a body surface area of 360 cm at a depth
2
of 25 m below the surface of sea water where Big turtle
the density of seawater is 1 025 kg m .
–3
A 900 N C 9 000 N
B 8 600 N D 9 200 N
Small turtle
15. A cylinder with diameter D contains mercury.
The pressure due to mercury is P. If the mercury Diagram 12
is poured into another cylinder with diameter
2D, what is the new pressure P’ due to mercury? The small turtle is 10 m below the surface of the
HOTS Applying water. What is the ratio of the total pressure on
1 the large turtle to the small turtle?
A P C P A 1:1 C 2:1
4
1 1 B 1:2 D 4:1
B P D P
2 8
20. Consider the density of air is 1.29 kg m
–3
2.2 Atmospheric Pressure and does not change with height. What is the
difference in pressure between the ground and
16. Mercury is used in Fortin barometers because the top of a hill with height 300 m?
A it is opaque A 890 Pa
B it is shiny B 1 927 Pa
C it does not stick to the glass tube C 3 870 Pa
D it has very high density D 5 600 Pa

25
Question 12: Question 20:
The length of the arrow shows the magnitude of the pressure. ∆ = hr∆h
pressure
Question 15: SOS TIP
Base area ∝ diameter . 2

Chp 2_1202 QB Physics F5.indd 25 07/01/2022 12:08 PM