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Which instrument is most suitable for measuring the thickness of a single sheet of paper?
The diagrams show distance–time graphs for four objects.
Which graph represents an object moving with an increasing speed?
An object has a weight of 6.4 N on the Earth where the gravitational field strength is 10 N/kg.
Which row states the mass and the weight of the object on the Moon where the gravitational field strength is 1.6 N/kg?
[Table_1]
Which substance in the table has the lowest density?
[Table_1]
A 20 m long, uniform bridge of weight 100 kN is supported at each end by pillars, as shown.
The pillars exert forces $T_1$ and $T_2$ on the ends of the bridge.
What are the values of $T_1$ and $T_2$ when a van of weight 24 kN is on the bridge, 5 m from the left-hand pillar?
A spring, which obeys Hooke's law, has an unstretched length of 10 cm.
A load of 20 N is suspended from the spring.
The new length of the spring is 36 cm.
What is the spring constant $k$ of the spring?
What is the relationship between the impulse acting on an object and the change in momentum of the object?
Electrical energy may be obtained from nuclear fission.
In which order is the energy transferred in this process?
A motor of power $P$ exerts a force $F$ on an object. The object moves a distance $d$ during the time $t$ that the force acts.
Which equation is used to calculate the time $t$?
A scientist uses an electric motor to lift a load through a vertical distance of 2.0 m.
He then increases the input power to the motor and repeats the experiment. The efficiency of the motor does not change.
Which row correctly describes the effect that this has on the useful work done lifting the load and the time taken to lift it?
[Table_1]
Four containers are filled to the top with the same liquid. The base of each container is circular.
Which container has the greatest pressure exerted by the liquid at its base?
A liquid is evaporating. The liquid is not boiling.
Which statement about the liquid is correct at an instant in time?
The diagram shows two cylinders connected by a narrow tube fitted with a tap.
One cylinder contains 80 cm$^3$ of gas at a pressure of 2.0 \times 10^5 Pa. The other cylinder contains a vacuum.
The volume of the evacuated cylinder is 20 cm$^3$. The tap is opened so that the gas can flow to fill both cylinders.
The temperature of the gas remains constant.
What is the new pressure of the gas?
An aluminium block has a mass of 200 g.
The specific heat capacity of aluminium is 900 J/(kg°C).
How much energy is needed to increase the temperature of the block from 20°C to 110°C?
The diagram shows a liquid-in-glass thermometer.
Which change to the design would result in a more sensitive thermometer?
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?
The diagram shows waves in a ripple tank containing water.
The waves approach a barrier and pass through the gap in the barrier.
The size of the gap is about the same size as the wavelength of the ripples.
The gap size is increased.
What happens to the ripple pattern to the right of the barrier?
The diagram shows a wave.
Which row correctly indicates the amplitude and the wavelength of the wave?
Two beams of light are both the same colour of red. One beam is travelling through air. The other beam is travelling through water. Each beam has a different brightness. Which quantity is the same for both sets of waves?
The diagram shows a ray of light in air incident on a glass block. Some of the light is refracted and some of the light is reflected. Two angles, $p$ and $q$, are marked on the diagram.
Which row gives the angle of incidence and states whether total internal reflection occurs?
[Table_1]
The diagram shows a ray of light in glass incident on the surface between the glass and air.
What happens if the angle of incidence is made larger than the critical angle for the glass?
The Sun emits infrared radiation and light. Light from the Sun reaches the Earth in 8 minutes.
Which row gives correct information about the infrared radiation?
[Table_1]
Which list shows regions of the electromagnetic spectrum in order of increasing frequency?
What is ultrasound?
An uncharged, metal sphere is placed on an insulating support. A positively charged rod is brought close to the sphere, but does not touch it.
How do the charges in the sphere move and what is now the charge on the sphere?
[Table_1]
In which circuit is the ammeter measuring the flow of charge through the lamp?
A lamp is connected to a cell.
Which circuit diagram shows the direction of conventional current $I$ and also the direction of flow of electrons $e$?
The diagram shows a circuit containing two resistors of resistance $1.0 \, \Omega$ and $2.0 \, \Omega$.
A voltmeter is connected across the $1.0 \, \Omega$ resistor by connecting P to X.
The reading on the voltmeter is 6.0 V.
P is moved to point Y in the circuit.
What is the new reading on the voltmeter?
The graph shows the current–voltage relationship for a circuit component X.
What happens to the resistance of X and what happens to the temperature of X as the voltage increases?
The diagrams show pairs of circuits containing logic gates.
In which diagram does the lower circuit of the pair behave differently from the upper circuit?
In which circuit do both lamps light?
Two resistors, with resistances $R_1$ and $R_2$, are connected in parallel. The resistance $R_1$ is greater than the resistance $R_2$. What is the resistance of the parallel combination?
The metal cases of electrical appliances are connected to an earth wire. Which statement is not correct?
What is the function of the split-ring commutator in an electric motor with a single rotating coil?
Which graph represents an alternating current (a.c.)?
The diagrams show a horizontal wire in a magnetic field.
The horizontal wire is firmly held at each end (not shown) and cannot move.
The magnets and holder are on a balance.
When there is no current in the wire, the reading on the balance is 0.35 g.
There is a d.c. current in the wire, as shown.
What happens to the reading on the balance?
The nucleus of an americium atom contains 146 neutrons and 95 protons. It decays by emitting an $\alpha$-particle.
How many neutrons and how many protons remain in the nucleus when this form of americium decays?
The graph shows how the count rate measured by a radioactivity detector placed near a radioactive sample changed with time.
Given that the background count rate is 30 counts/min, what is the half-life of this sample?
A teacher holds a radioactive source near a detector.
The reading on the detector is 320 counts/min.
The detector is switched on again after the source has been removed and it shows a reading of 20 counts/min.
What is the counts/min solely due to the source and why is there a reading on the detector when there is no radioactive source present?
Which statement is not correct?