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A length of cotton is measured between two points on a ruler.
When the length of cotton is wound closely around a pen, it goes round six times.
What is the distance once round the pen?
110
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When does an object falling vertically through the air reach terminal velocity?
70
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A sprinter runs a 100 m race in a straight line. The table shows how his speed changes with time for the first 5.0 s of the race.
[Table_1]
What is the average acceleration of the sprinter between time 2.0 s and time 3.0 s?
117
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A person steps onto a bathroom scales.
The bathroom scales records both mass and weight.
Which row shows the readings on the scales?
[Table_1]
71
55
An object has a weight of 7600N in a gravitational field of strength 100N/kg.
What is the mass of the object?
110
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A load is hung from a steel wire. The load is increased.
The length of the wire increases until the limit of proportionality is reached.
The load is now increased slightly.
What happens?
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The diagram shows a uniform metre rule pivoted at the 30cm mark.
The rule balances when a weight of 6.0N is hanging from the zero mark and a weight of 2.0N is hanging from the 70cm mark.
What is the weight of the rule?
71
56
An astronaut orbits the Earth in a space station.
Which is a vector quantity?
70
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A visitor to a fairground throws a soft object of mass 0.12 kg at a coconut of mass 0.48 kg. The soft object stops moving when it hits the coconut. In order to dislodge the coconut, it must be made to move at 0.10 m/s.
What is the minimum speed with which the visitor should throw the soft object in order to dislodge the coconut?
124
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An aircraft with a mass of 300 000 kg is flying at an altitude of 2000 m with a speed of 100 m/s.
What is the kinetic energy of the aircraft?
119
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Which method of drying clothes has the least impact on the environment?
69
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The vertical displacement of a mass of 0.20 kg changes with time. The graph shows how this displacement changes.
At which rate does it gain gravitational potential energy as it moves upwards?
131
60
A simple barometer includes a column of mercury. Which property of this column of mercury is used to give a measurement of atmospheric pressure?
137
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An oil tank has a base of area $2.5 \, \text{m}^2$ and is filled with oil to a depth of $1.2 \, \text{m}$.
The density of the oil is $800 \, \text{kg/m}^3$.
What is the force exerted on the base of the tank due to the oil?
123
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When molecules of a gas rebound from a wall of a container, the wall experiences a pressure. What is the cause of this pressure?
78
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Two liquid-in-glass thermometers P and Q contain the same volume of mercury and have capillary tubes of the same length. Thermometer P has a capillary tube with a smaller diameter than thermometer Q.
Which thermometer has the greater range and which has the greater sensitivity? [Table_1]
126
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A student wishes to calibrate a mercury-in-glass thermometer with a °C scale.
Which values should she use for the lower fixed point and for the upper fixed point?
[Table_1]
126
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The diagram shows a pan used for cooking food. Which row is correct for the materials used to make the base and the handle of the pan?
127
54
The diagram shows a wave.
Which row is correct?
65
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Light travels at a speed of $2.0 \times 10^8 \, \text{m/s}$ in a glass block.
In the glass, the wavelength of the light is $4.0 \times 10^{-7} \, \text{m}$.
What is the frequency of the light?
116
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Scout P signals to scout Q on the other side of a valley by using a mirror to reflect the Sun's light.
Which mirror position allows the Sun's light to be reflected to scout Q?
118
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Images formed by lenses and mirrors can either be described as real or as virtual.
Which row describes real and virtual images of a point object?
[Table_1]
81
60
The diagram shows the air molecules in part of a sound wave at a particular moment in time.
Which statement is not correct?
69
51
The diagram shows the ranges of human hearing and of ultrasound waves.
To which characteristic of sound waves do the numbers on the diagram refer?
69
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A permanent magnet is placed close to a bar of soft iron.
What are the polarities of end P and of end Q?
69
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Which method is used to demagnetise a magnet?
132
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Two power supplies are connected in separate circuits. Both power supplies provide the same magnitude current.
Power supply P has an electromotive force (e.m.f.) of 1.5V and power supply Q has an e.m.f. of 3.0V.
Which statements are correct?
1 Source Q supplies twice the charge per unit time.
2 Source Q supplies twice the energy per unit charge.
3 Source Q supplies twice the energy per unit time.
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A student measures the potential difference across a device and the current in the device. Which calculation gives the resistance of the device?
110
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An electricity meter records that 200MJ of electrical energy are drawn from the 240V mains supply in a 24 hour period. What is the average rate of electrical charge passing through the meter?
124
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A 3.0\,\Omega \text{ resistor is connected in parallel with a 4.0 }\,\Omega \text{ resistor.}
What is the resistance of this combination?
133
57
A student sets up this circuit.
What is the purpose of the circuit?
112
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The diagram shows two voltmeters P and Q connected to a potential divider. The sliding connection at point X is moved towards the top of the diagram. What happens to the reading on P and to the reading on Q?
129
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The diagram shows a logic circuit with inputs X and Y. The output is Q.
Which truth table is correct?
133
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A wire connected to a resistor is moved in a magnetic field. A current is induced in the direction shown.
In which direction is the wire moved?
73
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The diagram shows a transformer.
Which materials are the most suitable for the core and for the coils?
[Table_1]
63
52
A solenoid is connected to a battery.
Which statement about the magnetic field at the centre of the solenoid is correct?
121
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In the atomic model, an atom consists of a central mass, orbited by much smaller particles.
What is the name of the central mass and of the orbiting particles?
131
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The radiation from a radioactive source passes between two metal plates, and is deflected as shown in the diagram. Between the plates there is a magnetic field directed into the plane of the paper, as indicated by the crosses.
Only one type of radiation is present. Which situation is possible?
78
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The nucleus of an isotope of nitrogen (N) absorbs a neutron. It then decays into an isotope of carbon (C) and emits x.
$$^1_0 n + ^{14}_7 N \rightarrow ^{14}_6 C + x$$
What is x?
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The graph shows how the count rate registered by a counter near to a sample of a radioactive isotope changes over a period of a few days. The background count rate is 5 counts per minute.
What is the half-life of the isotope?
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