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What is the most accurate and precise method to measure the thickness of a coin?
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A student determines the average speed of a bubble rising through a liquid at constant speed. When the student starts the stopwatch the bubble is at position P. After 2.0 s the bubble is at position Q.
What is the speed of the bubble between P and Q?
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The diagram shows the speed-time graph for a toy car travelling in a straight line.
What is the acceleration of the car during the first two seconds and what is the total distance that it travels?
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In which pair are both quantities measured in newtons?
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The masses of a measuring cylinder before and after pouring some liquid into it are shown in the diagram.
What is the density of the liquid?
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A spring which obeys Hooke’s Law has an unstretched length of 10 cm. A load of 20 N is hung from the spring. The new length of the spring is 36 cm. What is the spring constant $k$ of the spring?
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A car travels forwards along a straight horizontal road. Only the horizontal forces acting on it are shown.
[Image_1: Car with arrows indicating 'driving force' and 'air resistance and friction']
The length of each arrow represents the size of each force.
How do these forces affect the motion of the car?
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The diagram shows a wooden beam of weight 20N. The centre of mass of the beam is labelled $M$.
There is a pivot at one end of the beam. The beam is kept horizontal by an upward force, $F$.
What is the magnitude of $F$?
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A ball of mass 2.0 kg is travelling at a speed of 12 m/s. It moves towards an object of mass 3.0 kg which is at rest. The ball hits the object and sticks to it.
Which row gives the total momentum, and the speed of both objects immediately after the collision?
| total momentum kg m/s | speed m/s | |
|---|---|---|
| A | 0 | 4.8 |
| B | 0 | 8.0 |
| C | 24 | 4.8 |
| D | 24 | 8.0 |
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An object falls from a height of 5.0 m.
Air resistance can be ignored.
As it hits the ground the object has 750 J of kinetic energy.
What is its mass?
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An electric generator produces an electromotive force (e.m.f.) of 200V and produces a current of 3.0A in a circuit. The generator is driven by an engine with a power of 2.4kW.
What is the efficiency of the generator?
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The diagrams show athletes training by stretching springs.
Each spring has the same stiffness.
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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A student blows air through a liquid using a straw. This causes the liquid to evaporate quickly and therefore to cool.
Which statement explains why the remaining liquid cools?
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What is meant by the specific latent heat of fusion of ice?
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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 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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The incomplete ray diagram shows two rays of light that have passed from one point on an object through a thin converging lens. Which type of image is formed, and on which side of the lens is it formed?
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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?
[Table_1]
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A student demagnetises a magnetised steel bar. He places the bar in a solenoid connected to a power supply. He then removes the bar from the solenoid. Which row indicates the most effective way of demagnetising the bar?
[Table_1]
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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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What is wrong with this labelled diagram of a permanent magnet?
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A student tests the electrical conduction of four materials.
aluminium
iron
plastic
silver
Which materials conduct electricity?
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An isolated metal sphere is positively charged.
It is then brought near to another isolated metal sphere that is neutral.
What happens to the charges on the neutral sphere as the positively charged sphere is brought close to it?
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Which diagram is the current-voltage (I-V) characteristic graph for a metallic conductor at constant temperature?
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Four circuits each contain a 6V battery, a diode, an ammeter and a lamp. None of the components is faulty. Which circuit shows a possible ammeter reading?
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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 an electric circuit.
What is the potential difference (p.d.) across the LDR?
502
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512
What does the symbol shown represent?
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Which device uses a split-ring commutator?
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Which particle has a negative charge?
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A type of nuclear reaction takes place in stars.
Which row describes this type of reaction?
[Table_1]
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A sample of radioactive isotope is decaying.
The nuclei of which atoms will decay first?
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A sample of a radioactive isotope emits particles at a rate of 240 per minute.
After 48 hours the rate of emission has decreased to 15 per minute.
What is the half-life of the radioactive material?
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