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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?
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When does an object falling vertically through the air reach terminal velocity?
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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?
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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]
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An object has a weight of 7600N in a gravitational field of strength 100N/kg.
What is the mass of the object?
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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?
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An astronaut orbits the Earth in a space station.
Which is a vector quantity?
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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?
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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?
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Which method of drying clothes has the least impact on the environment?
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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?
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A simple barometer includes a column of mercury. Which property of this column of mercury is used to give a measurement of atmospheric pressure?
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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?
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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?
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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]
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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]
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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?
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The diagram shows a wave.
Which row is correct?
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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?
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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?
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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]
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The diagram shows the air molecules in part of a sound wave at a particular moment in time.
Which statement is not correct?
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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?
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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?
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Which method is used to demagnetise a magnet?
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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?
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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?
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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?
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A student sets up this circuit.
What is the purpose of the circuit?
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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?
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The diagram shows a logic circuit with inputs X and Y. The output is Q.
Which truth table is correct?
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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?
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The diagram shows a transformer.
Which materials are the most suitable for the core and for the coils?
[Table_1]
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A solenoid is connected to a battery.
Which statement about the magnetic field at the centre of the solenoid is correct?
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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?
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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?
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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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