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Which measuring instrument is used to measure the diameter of a thin metal wire?
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A car starts from rest.
The table shows the readings from its speedometer every 10 s.
[Table_1]
Which row describes the car's motion in the first 30 seconds and in the last 30 seconds?
[Table_2]
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593
Which property of an object is a consequence of the effect of a gravitational field acting on it?
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The diagram shows the dimensions of a solid rectangular block of metal of mass $m$.
Which expression is used to calculate the density of the metal?
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A wheelbarrow has a weight $W$ of 140 N.
Which vertical force $F$ is needed to support the wheelbarrow in the position shown?
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A car is travelling around a circular track at a constant speed, as shown.
In which direction is the resultant force on the car?
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The diagram shows part of a hose used by a firefighter.
15 kg of water flows through the hose each second.
Which force is applied to the hose by the water?
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Brakes are used to slow down a moving car.
Into which form of energy is most of the kinetic energy converted as the car slows down?
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An object has kinetic energy of 200 J.
A constant resultant force of 190 N is applied in the direction of its motion through a distance of 10 m.
What is the final kinetic energy of the object?
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The statements describe what happens when the power of a machine is increased.
1. The work done in a given time decreases.
2. The work done in a given time increases.
3. The time taken to do a given quantity of work decreases.
4. The time taken to do a given quantity of work increases.
Which statements are correct?
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A manometer containing water is used to measure the pressure of a gas supply, as shown.
The density of water is 1000 kg/m3.
What is the pressure of the gas supply?
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A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the gas is kept constant.
How does this change affect the average kinetic energy of the molecules and the pressure on the walls of the container? [Table_1]
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Which row correctly describes boiling and evaporation of water?
[Table_1]
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The diagram shows a liquid-in-glass thermometer.
Which change increases the sensitivity of the thermometer?
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The diagram shows a liquid-in-glass thermometer with a uniform capillary tube.
Which temperature is indicated by the thermometer?
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Four thermometers, with their bulbs painted different colours, are placed at equal distances from a radiant heater. Which thermometer shows the slowest temperature rise when the heater is first switched on?
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A wave source produces 3000 crests every minute. The wave has a speed of 300 m/s.
What is the wavelength of the wave?
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The diagrams show two sets of wavefronts in a ripple tank.
A student makes two statements about the waves.
1. When the waves reflect from the barrier the direction changes but the wavelength remains the same.
2. When the waves refract as they enter the shallow water the direction remains the same, but the wavelength changes.
Which statements are correct?
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A composite block is made by joining together three transparent materials. The diagram shows a ray of light passing through the composite block. Which list gives the three materials in order of the speeds of light in the materials, from slowest to fastest?
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An object is placed 30 cm in front of a plane mirror.
Which statement describes the image of the object?
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A ray of light is shone onto the surface of a mirror.
Which two angles represent the angle of incidence and the angle of reflection?
582
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511
The speed of sound in air is 330 m/s. How do the speeds of sound in concrete and water compare with this speed? [Table_1]
510
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An observer stands at the finish line of a 100 m race. He wants to time the winner's run. He starts his stop-watch as soon as he sees the smoke from the starting gun instead of when he hears the bang.
What is the reason for doing this?
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Which statement is not a method for magnetising an iron bar?
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The diagram shows a circuit containing a variable resistor connected to a variable power supply.
The table shows the currents for different values of the potential difference (p.d.) and the resistance.
What is the order of the currents from smallest to largest?
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Which diagram shows the electric field pattern around a positive charge?
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A negatively charged plastic rod P is placed above a positively charged plastic rod Q.
What are the directions of the electrostatic forces on rod P and on rod Q?
[Table_1]
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A lamp rated 12 V, 2.0 A is switched on for one minute.
How much energy is transferred by the lamp?
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An alternating current (a.c.) power supply is connected in series with a resistor R and a diode.
Which graph shows how the voltage V across the resistor R varies with time?
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A student makes four resistors using different pieces of wire. The wires have different diameters and lengths. All the pieces of wire are made of the same material.
Which piece of wire will make the resistor with the largest resistance?
[Table_1]
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543
Which diagram shows a circuit containing a battery, a fuse and a buzzer?
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The diagram shows a network of logic gates.
Which single logic gate, placed between X, Y and OUT, would have the same effect as the network?
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The diagram represents a transformer.
Which row shows materials suitable for making the core and the primary coil?
580
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The diagrams show the magnetic field lines around a wire carrying a current, $I$.
Which diagrams are correct?
505
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Which statement about electromagnetic induction is correct?
543
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A very important experiment increased scientists' understanding of the structure of matter.
In the experiment, particles scattered as they passed through a thin metal foil.
Which particles were used, and to which conclusion did the experiment lead?
[Table_1]
520
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Polonium, Po, has a proton number equal to 84 and a nucleon number equal to 218. Polonium changes into astatine, At, by emitting a β-particle. Which equation represents this decay?
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The graph shows how the count rate from a radioactive isotope changes with time.
What is the half-life of this isotope?
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What is the nature of $\alpha$-emission?
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