Physics Half Early Exam - Maria Regina College, Mosta Secondary School Zokrija, 2012/2013 Page 3
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2.
This question is about pressure in gases.
particles
Figure 1 shows air particles moving in a closed container.
container
Underline the correct answer:
Figure 1
a) The air particles move in (different directions, one direction).
[1]
b) At room temperature they move very (slow, fast).
[1]
c) If the container is heated, the particles move at (lower, higher) speeds.
[1]
d) If the same number of particles are placed in a smaller container they hit the
e) inside of the container (more, less) often.
[1]
e) If some particles are removed from the container, the particles collide
e) (more, less) often.
[1]
f) In which case (c, d or e) will the pressure decrease? Explain.
___________________________________________________________
___________________________________________________________
[3]
3.
This question is about scalar and vector quantities.
a) Physical quantities can be either scalars or vectors.
(i) A scalar quantity has ________________ only.
[1]
(ii) A vector quantity has both _______________ and __________________. [2]
b) The following are six physical quantities:
mass
mass
mass
mass
velocity
velocity
velocity
velocity
time
time
time
time
weight
weight
density
density
friction
friction
weight
weight
density
density
friction
friction
(i) Which three of them are scalars?
___________________
___________________
___________________
[3]
(ii) Which two of them are forces?
___________________
___________________
[2]
Physics Half yearly exam 2013 – Track 3 - Form 3
Page 3 of 10
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