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What is the most accurate and precise method to measure the thickness of a coin?
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A pendulum is swinging. Five students each measure the time it takes to swing through ten complete swings.
Three students measure the time as 17.2 s. Another student measures it as 16.9 s, and the fifth student measures it as 17.0 s.
What is the average period of the pendulum?
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Which distance-time graph represents a body whose speed is decreasing?
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What are the units for mass, pressure and velocity?
[Table_1]
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A steel ball bearing has a mass of 24g and a density of 8.0g/cm^3. It is lowered into a measuring cylinder containing 12cm^3 of water.
What is the new water level in the cylinder?
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The diagram shows an object being acted upon by two forces. What is the size of the resultant force on the object?
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The diagram shows a man holding a sack and barrow stationary. He applies a vertical force to the handle.
The centre of mass and the weight of the sack and barrow are shown. The wheel acts as a pivot.
What is the magnitude of the vertical force exerted by the man?
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The diagram shows the only two forces $F_1$ and $F_2$ acting on an object. The magnitude of each force is represented by the length of each arrow.
The resultant force acting on the object is $R$.
Which vector diagram shows how forces $F_1$ and $F_2$ add to produce $R$?
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The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram.
Which body gains the most kinetic energy when moving a distance of 1.0 m?
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A steel ball is fired vertically upwards with a velocity $v$. The ball reaches a height $h$.
The same ball is now fired vertically upwards from the same position with a velocity $2v$.
Air resistance can be ignored.
What is the new height reached by the ball?
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A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient.
What is the power input of the sunlight onto the solar panel?
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The diagrams show four different athletes training by doing pull-ups.
Which athlete does the most work?
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Four different liquids are poured into four containers.
The diagrams show the depth and the density of liquid in each container.
In which container is the pressure on its base the greatest?
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Brownian motion is observed when using a microscope to look at smoke particles in air. What causes the smoke particles to move at random?
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The diagrams show four open dishes. Each dish contains water at the same temperature. The dishes are different shapes and a draught blows over two of them. From which container does the water evaporate at the greatest rate?
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Equal masses of two different liquids are put into identical beakers. Liquid 1 is heated for 100 s and liquid 2 is heated for 200 s by heaters of the same power. Each liquid has the same rise in temperature. Which statement is correct?
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A block of ice at -20°C is heated until it turns to steam. The graph of temperature against thermal energy absorbed is shown. The latent heat of fusion of ice is 340 kJ/kg.
What is the mass of the ice?
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A copper bar and a wooden bar are joined. A piece of paper is wrapped tightly around the join. The bar is heated strongly at the centre for a short time, and the paper goes brown on one side only.
Which side goes brown, and what does this show about wood and copper?
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Different waves hit barriers with different sized gaps. The waves will diffract. In which diagram does the greatest spreading occur?
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A converging lens is used to make an image on a screen.
What type of image is formed on the screen?
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Which diagram shows what happens when a ray of white light passes through a prism?
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Light travels in a vacuum and then enters a glass block. The speed of the light in the glass block is $2.0 \times 10^8\, \text{m/s}$.
Which statement about the speed of light is correct?
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A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch.
What effect does this have on the amplitude and on the frequency of the sound?
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In which way are a bar magnet and an electromagnet similar?
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A magnet near a coil of wire is attracted to the coil only when there is a current in the coil. Which statement explains this force of attraction?
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A steel magnet is placed in a coil and demagnetised. Which type of current is established in the coil, and how is the current changed?
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The diagrams each show a positive point charge.
Which diagram represents the pattern and the direction of the electric field due to the charge?
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A circuit contains a fixed resistor. The potential difference across the resistor is 24.0V and the current in the resistor is 2.30A.
How much energy is transferred in the resistor in a time of 17.0 minutes?
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A battery, an ammeter, a switch, a lamp and a resistor are connected together in a circuit.
With the switch open, the ammeter reads 2.4 A. When the switch is closed, this reading increases to 4.0 A.
What is the current through the resistor with the switch closed?
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A student connects a variable potential divider (potentiometer) circuit.
What happens to the reading on the voltmeter as the sliding terminal T is moved from R to S?
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The diagram shows a circuit used to make a light detector.
One component is connected between X and Y.
Which component causes the ammeter reading to increase when the light gets brighter?
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A truth table for a type of logic gate is shown.
[Table_1]
Which type of logic gate is it?
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In which device is a split-ring commutator used, and what is its purpose? [Table_1]
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When a source of $\alpha$-particles is directed towards a thin metal foil they become scattered.
Which observation of this experiment provides evidence for a small charged nucleus?
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Which description of a neutral atom of copper is correct?
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A sample of radioactive isotope is decaying.
The nuclei of which atoms will decay first?
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A student determines the half-life of a radioactive isotope. The student uses a detector over five minutes and plots a graph showing how the count rate shown on the detector varies with time. The count rate due to background radiation is 30 counts per minute.
What is the half-life of this isotope?
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