Junior Lyceum Annual Examinations In Physics Form 5 - 2011 Page 6
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115.
The diagram below shows Martha’s study. On a very cold Sunday evening, Martha
turns the gas heater on. The three arrows F, G and H show the air movement in the
room while the heater is turned on.
F
closed door
closed window
G
ceramic
tiled floor
heater
H
a.
Which arrow shows the:
i.
1
coldest volume of the air in the room?
__________
ii.
1
hottest volume of the air in the room?
__________
b.
1
Heat energy is transferred throughout Martha’s room by
______________.
c.
Martha turns the gas heater on for 1 hour. Assuming that no air escapes from the room,
state what changes, if any, take place to the:
i.
1
mass of the air inside the room,
__________________________
ii.
1
total volume of the air inside the room,
__________________________
iii.
density of the air directly above the heater,
1
__________________________
iv.
1
average air pressure inside the room.
__________________________
d.
A few purple crystals were placed in a beaker full of water as shown in the diagram
below. Draw what is observed when the beaker is heated.
water
purple crystals
heat
1
Page 6 of 11
Physics – Junior Lyceum – Form 5 – 2011
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