No questions found
Which quantity can be measured directly using a micrometer screw gauge?
513
580
562
Four objects are moving along a straight line.
The distance of an object from a fixed point on the line is plotted against time for each object.
Which object is decelerating?
526
591
504
A heavy metal ball falls vertically downwards through air past four equally spaced levels J, K, L, and M. The times taken to fall from one level to the next are measured. Where is the speed of the ball greatest and which time is shortest?
593
584
523
Four students make statements about the mass of an object. Which statement is correct?
545
589
575
A metal has a density of 8.0 g/cm$^{3}$. A solid cube of mass 1.0 kg is made from this metal.
How long is each side of the cube?
583
591
579
An experiment is done to determine the spring constant for a spring.
Different loads are hung from the spring and its length is measured for each different load.
The graph shows how its length varies with load.
What is the value of the spring constant?
539
583
578
A beam is pivoted at its centre of mass. It is acted upon by two forces, 10 N and 5.0 N, as shown. What is the resultant moment about the pivot?
591
551
579
An object of mass 4.0 kg is moving with a velocity of 3.0 m/s in a straight line. What is the momentum of the object?
517
599
563
A machine is very efficient. What does this mean?
531
562
592
A force $F$ acts on a body and the body moves a distance $d$ in the direction of the force.
Which expression for the work done $W$ is correct?
512
561
504
A boy produces an average power output of 60W as he rides his bicycle for 2.0 minutes.
How much useful energy does he expend?
584
552
517
The diagram shows a stone suspended on a string under the surface of a liquid. The stone experiences a pressure caused by the liquid.
What would increase the pressure on the stone?
530
515
586
At room temperature, iron is difficult to compress.
At the same temperature, oxygen is much easier to compress.
Which comparison of the structures of iron and oxygen explains this?
544
598
505
A night storage heater contains a large block of material that is heated electrically during the night. During the day the block cools down, releasing thermal energy into the room.
Which thermal capacity and which night-time temperature increase will cause the most energy to be stored by the block?
551
545
576
100g of water at 25°C is poured into an insulated cup. 50g of ice at 0°C is added to the water. The water is stirred until the temperature of the water has fallen to 0°C.
18g of ice remains unmelted.
The specific heat capacity of water is 4.2 J/g°C.
Which value does this experiment give for the specific latent heat of fusion of ice?
532
582
575
The handle of a metal saucepan is made of plastic. As the saucepan heats up, the handle gets warmer.
Which statement explains this?
563
553
589
The metal surface of a kettle is hot.
What happens to the cool air outside the kettle when it comes into contact with the hot kettle?
553
502
531
Vacuum flasks usually have silvered walls that help to keep the contents of the flask hot. Why are the walls silvered?
530
543
528
When water waves pass through a gap they diffract.
The diagrams show wavefronts approaching a narrow gap.
In which diagram will the diffraction be least?
542
596
521
Which conditions are necessary for light to be totally internally reflected?
[Table_1]
569
506
569
Light is travelling through air. The light strikes a glass block at an angle of incidence of 45°. The glass has a refractive index of 1.4.
What is the angle of refraction of the light as it enters the glass?
554
559
545
An eclipse of the Sun happens when the Moon comes between the Earth and the Sun.
Which statement is correct?
538
532
543
A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is reflected from a shoal of fish. The sound reaches the boat again after 1.2 s. The speed of sound in the water is 1500 m/s. How far below the bottom of the boat is the shoal of fish?
523
590
540
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?
553
583
509
A soft iron bar is a long way from any magnetic field.
How can the material of the bar be described?
581
525
529
Diagram 1 shows two thin, uncharged strips of plastic.
Diagram 2 shows the same strips after they have been rubbed with a dry cloth.
Which row describes the charge on the strips after rubbing, and the force between the strips after rubbing?
590
505
597
A cell has an electromotive force (e.m.f.) of 1.5V.
What does this statement mean?
545
507
554
A metal wire of length 100 cm and cross-sectional area 0.20 mm$^2$ has a resistance of 8.0 Ω.
What is the resistance of a wire of the same metal of length 50 cm and cross-sectional area of 0.40 mm$^2$?
528
565
512
The diagram shows a circuit.
What is connected in parallel with the thermistor?
567
557
598
A lamp is to be connected in a circuit so that the potential difference (p.d.) across it can be varied from 0 to 6V. Which circuit would be most suitable?
530
520
510
Components X and Y can be inserted to complete the circuit below. The completed circuit is a potential divider in which the potential difference across component Y increases when the temperature increases. Which row shows the components X and Y? [Table_1]
514
506
511
Which two logic gates each have a high output (1) when both of their inputs are low (0)?
565
530
581
Two NAND gates are joined together as shown.
Which single logic gate is equivalent to this combination?
544
577
565
Which components are designed to improve the safe working of a mains electrical supply? [Table_1]
588
515
559
The diagram shows a current-carrying wire placed between two magnetic poles. The current is in the direction shown.
What is the direction of the force on the wire?
584
528
509
Diagram 1 shows an a.c. generator. The coil is turning as shown.
Diagram 2 shows the output voltage produced by the generator as the coil turns.
Which point on diagram 2 shows the voltage induced when the coil is moving through the position shown in diagram 1?
552
536
544
Which observation provides evidence for the nuclear atom?
530
589
519
The chemical symbol for uranium is U. The equation represents the radioactive decay of uranium-235.
$^{235}_{92}\text{U} \rightarrow ^x_y\text{Th} + ^4_2\text{He}$
What are the numbers x and y?
[Table_1]
554
540
595
An experiment is done to measure the radiation from a radioactive source that has a half-life of 10 minutes.
The source is placed close to a detector that is connected to a counter, as shown.
The average background count-rate is 20 counts/minute.
At the start of the experiment, the count-rate recorded by the counter is 1000 counts/minute.
What is the count-rate 10 minutes later?
548
596
564
