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WorksheetsIB Physics Topic 3
Total questions: 14
Worksheet time: 17mins
Name
Class
Date
1.
Which statement about the pressure in a column of liquid is correct?
a)
It acts only vertically downwards.
b)
It increases if the column width increases.
c)
It increases with depth in the column.
d)
It is uniform throughout the column.
2.
An airtight container holds a fixed quantity of gas. Its pressure and volume are measured on four occasions when the temperature is 20 °C. The results are shown in the table. Which set of readings is incorrect?
a)
A
b)
B
c)
C
d)
D
3.
In a vacuum flask, which methods of heat transfer are prevented by the vacuum?
a)
conduction only
b)
convection only
c)
conduction and convection only
d)
conduction, convection, and radiation
4.
Ice is taken from a freezer and left in a room. The ice melts and eventually the water reaches room temperature.
Which energy transfers take place?
Which energy transfers take place?
a)
A
b)
B
c)
C
d)
D
5.
Some air is trapped inside a small balloon. The average kinetic energy of the air molecules in the balloon is increased. What remains the same?
a)
the density of the air in the balloon
b)
the mass of the air in the balloon
c)
the temperature of the air in the balloon
d)
the volume of the air in the balloon
6.
A substance that is originally a solid is heated strongly for some time.
At one stage, the energy given to the substance is used as latent heat of vaporisation. At this stage, what change does the energy cause?
At one stage, the energy given to the substance is used as latent heat of vaporisation. At this stage, what change does the energy cause?
a)
It breaks the bonds holding the molecules together. Molecules escape from the liquid.
b)
It breaks the bonds holding the molecules together. The solid becomes liquid.
c)
It makes the molecules move faster but there is still a strong attraction between them.
d)
It makes the molecules move faster and so the temperature rises.
7.
What happens when a metal bar is heated?
a)
The distance between the molecules increases, making the bar longer.
b)
The molecules get larger, making the bar longer.
c)
The molecules vibrate more quickly, making the bar denser.
d)
The speed of the molecules increases, making the bar thinner.
8.
A fixed mass of gas at constant temperature is compressed to reduce its volume. How do the molecules of gas now strike the walls of the container?
a)
less often than before with a higher velocity
b)
less often than before with the same velocity
c)
more often than before with a higher velocity
d)
more often than before with the same velocity
9.
An ice-cube has a mass of 7.50 g. The ice-cube is at 0 °C. Heat from the surroundings reaches the ice-cube at an average rate of 1.25 J / s. How long does it take for all of the ice to melt? (specific latent heat of fusion of ice = 333 J / g)
a)
35.5s
b)
55.5s
c)
2000s
d)
3120s
10.
According to the kinetic theory, matter is made up of very small particles in a constant state of motion. Which row best describes the particle behaviour in the liquid state?
a)
A
b)
B
c)
C
d)
D
11.
An ice pack is used to cool 0.25 kg of water. The specific heat capacity of water is 4.2 kJ / (kg °C). How much thermal energy (heat) must the ice pack extract from the water to reduce the water temperature by 15 °C?
a)
0.070kJ
b)
1.1kJ
c)
16kJ
d)
250kJ
12.
A partially-inflated balloon is placed inside a bell jar. The bell jar is connected to an air pump. The air pump is switched on and air is removed from the bell jar.
What happens to the pressure and to the volume of the gas inside the balloon?
What happens to the pressure and to the volume of the gas inside the balloon?
a)
pressure decreases
volume decreases
volume decreases
b)
pressure decreases
volume increases
volume increases
c)
pressure increases
volume decreases
volume decreases
d)
pressure increases
volume increases
volume increases
13.
A hot liquid is allowed to cool. The graph shows the cooling curve. In which part of the curve is latent heat released?
a)
PQ
b)
QR
c)
RS
d)
ST
14.
For the same temperature rise and the same original volume, which of the three states of matter expands the most and which state expands the least?
a)
A
b)
B
c)
C
d)
D
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