Page 170 - Physics

Physics for Secondary Schools

(a) (b) (c) (d)
air Vacuum

h
liquid h liquid h liquid h liquid

Figure 7.44

(x) Match each item from Column A with its corresponding item in Column B. Then,
write a letter of the correct response in the provided space.

Column A Answers Column B
1. A device for measuring A. Minimum force
atmospheric pressure B. Hydraulic press
2. Uses Pascal's principle C. N/m 2
to operate D. Pascal
3. SI unit of pressure E. Maximum force
4. Razor blades, knife F. Manometer
5. Application of G. High pressure
atmospheric pressure H. Low pressure
I. Aneroid barometer
J. Bicycle pump

Section B 5. Explain why hitting an infl ated
2. (a) Describe the concept of pressure. balloon with a hammer will not
(b) State the SI unit of pressure. cause it to burst but sticking it with
(c) Name devices that are used for a pin will.
measuring pressure. 6. A can holds water with a constant
3. State Pascal’s principle. depth of 0.5 m. Hole A is punched
in the can 0.1 m below the surface
4. (a) How can the pressure of a gas of the water and hole B is punched
be measured? 0.4 m from the surface. From which
(b) The open end of a rubber tubing hole will the water spurt the furthest?
of a mercury manometre is Explain your answer.
placed in a fl uid of density
1.2 g/cm . The mercury in the 7. A curved, glass tube is open at one
3
manometre rises by 3.0 cm. end and sealed at the other. A dense
What is the depth of the fl uid liquid is poured into the tube. The
at the end of the rubber tubing? liquid traps air in the sealed end.
(Density of mercury = Figure 7.44 shows the tube, the
13.6 g/cm ). liquid and the trapped air.
3

164
Student’s Book Form One

Physics Form 1 Final.indd 164 16/10/2024 20:57