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In order to determine the period of a pendulum, a student times one complete swing of the pendulum using an analogue stopwatch with a second hand. Which change of method produces the greatest improvement in accuracy?
505
552
594
The graph shows the speed of a car travelling through a town. Which section of the graph represents a period when the car is decelerating?
524
555
503
An object weighs 19 N on a planet where the acceleration of free fall is 3.8 m/s^2. What is the mass of the object?
529
556
505
An object is suspended from a spring balance on the Earth. The same object is suspended from the same spring balance on another planet. Which statement explains the difference between the two readings?
547
527
548
A student has a bottle of cooking oil. She determines the density of the cooking oil. Which apparatus does she need? [Table_1]
546
550
537
Forces are applied to four identical objects. The length of each arrow indicates the magnitude of the force. Which object is in equilibrium?
586
503
595
The diagram shows a wooden beam PQ which is attached to a wall by a pivot at P and kept in a horizontal position by a vertical rope attached at Q.
A box has been placed on the beam.
Which changes must reduce the tension in the rope at Q?
537
557
551
A cyclist travels down a hill from rest at point X without pedalling. The cyclist applies his brakes and the cycle stops at point Y. Which energy transfers have taken place between X and Y?
527
541
556
Which energy resource is non-renewable?
549
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599
A pump does 460000 J of work to raise water to fill a tank. It takes 7 minutes to fill the tank. What is the power of the pump?
540
513
526
When a diver swims down from the surface of the water to a depth of 10m, the pressure experienced increases from 100,000 N/m\(^{2}\) to 200,000 N/m\(^{2}\). Which statement explains this increase in pressure?
558
501
555
Why can a gas be compressed easily into a smaller volume?
592
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503
The melting point of mercury is -39\degree C. What is the melting point of mercury in kelvin?
588
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519
A bimetallic strip is used to control the temperature of an electrical appliance. It is made of two different metals fixed together.
The diagram shows the shape of the bimetallic strip before and after heating.
Which statement is correct?
582
567
582
A student has two blocks of metal, X and Y. The temperature of X is 50°C and the temperature of Y is 0°C. The two blocks are placed in contact with each other, as shown. After some time, both blocks have a temperature of 25°C. What has happened to the internal energy of each block?
516
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559
The diagram shows the view of a room heated by a radiator. The arrowed line from X to Y is the path of the convection current in the air. Which row about the air temperature and the air density at X and at Y is correct?
562
573
532
Which statements about waves are correct?
1. Only longitudinal waves can undergo diffraction.
2. All waves can undergo refraction.
3. All waves can undergo reflection.
600
595
553
Which quantities relating to a wave on the surface of water can both be measured in metres?
582
536
530
Which diagram correctly shows the dispersion of white light through a glass prism?
535
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568
A ray of light is reflected by a plane mirror. Which row shows the angle of incidence and the angle of reflection? [Table_1]
560
516
536
A thin converging lens is used to produce a real image of an object.
Which statement about the real image is always correct?
503
538
576
Where do all types of electromagnetic waves travel at the same speed?
576
581
508
Dogs can hear sounds in the range from 100 Hz to 45 kHz. Which statement is correct?
599
526
515
Which metal could be used for a permanent magnet and which metal could be used for the core of an electromagnet? [Table_1]
576
586
576
Object 1 is given a negative charge and placed on a balance. Object 2, which is also charged, is brought close to object 1 and the reading on the balance changes as shown: Which action would further decrease the reading on the balance?
562
522
510
Which statement about a voltmeter is correct?
560
516
574
How does the resistance of a metallic wire change:
• as its length increases
• as its cross-sectional area decreases?
[Table_1]
564
598
519
A plastic rod is rubbed with a cloth. The rod becomes positively charged because of the movement of charged particles.
Which row gives the name of these charged particles and the direction in which they move? [Table_1]
599
570
587
Two 2.0 \Omega resistors are connected in parallel. What is the combined resistance of the resistors?
575
597
545
An electric heater is plugged into the mains supply using a fused plug.
The current in the heater is 10 A.
The cable attached to the heater is rated at 15 A.
The fuses available are rated at 1.0 A, 3.0 A, 5.0 A and 13 A.
Which fuse should be used?
581
560
544
A teacher sets up the equipment for three demonstrations, P, Q, and R. In demonstration P, the magnet is moved to the right. In demonstration Q, the switch is closed. In demonstration R, the copper rod is moved vertically upwards. Which demonstrations can be used to demonstrate electromagnetic induction?
586
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590
A metal rod PQ rests on two horizontal metal wires that are attached to a battery. The rod lies between the poles of a magnet.
When the switch is closed, the rod moves to the right.
What could be changed so that the rod moves to the left?
577
572
531
A transformer in a computer is used to transform the mains voltage of 240 V to 12 V.
The number of turns on the secondary coil is 2000.
Which statement about the transformer is correct?
552
575
508
Atom P has 6 electrons, 6 protons and 6 neutrons.
Atom Q has 6 electrons, 6 protons and 7 neutrons.
Which statement is correct?
521
589
516
α-particles, β-particles and γ-rays are emitted by radioactive nuclei when they decay. Which emissions can be deflected by an electric field?
546
551
557
The graph shows the count rate from a radioactive source over a period of time.
What is the half-life of the source?
559
518
577
A scientist carries out an experiment using a sealed source which emits \( \beta \)-particles. The range of the \( \beta \)-particles in the air is about 30 cm.
Which precaution is the most effective to protect the scientist from the radiation?
517
528
573
Which planet orbits the Sun between Mars and Saturn?
510
570
573
Which statement about the Sun is correct?
504
553
589
Which quantity does a light-year measure?
592
506
527
