A student has a measuring cylinder containing water and also has a balance.
Which of these could she use to find the volume of a small metal sphere?
She has no other apparatus.
Two rockets are launched at the same time from the surface of the Earth. The graph shows how the speeds of the rockets change with time.
Which statement about the rockets is correct?
A train begins a journey from a station and travels 60 km in a time of 20 minutes.
What is the average speed of the train?
What is weight?
The diagram shows a bird in flight. The bird is flying in a horizontal direction to the right.
In which direction does air resistance act on the bird?
A small bottle has a mass of 20 g when empty. The volume of the bottle is 10 cm3
.
When full of liquid, the total mass is 150 g.
What is the density of the liquid?
A rocket is traveling vertically upwards. Three vertical forces act on it.
The thrust acts upwards and is equal to 100 000N.
The weight acts downwards and is equal to 80 000N.
What is the air resistance force acting on the rocket when it is traveling upwards at constant speed?
Which energy source boils water to make steam in power stations?
Two people X and Y sit on a see-saw, as shown.
X weighs 400 N and sits 1.5 m from the pivot.
The weight of the see-saw is 300 N and acts through the pivot.
When the see-saw is balanced, the pivot pushes up on the see-saw with a force of 900 N.
What is the weight of person Y and how far from the pivot is he sitting?
A horizontal force pulls a box along a horizontal surface.
The box gains 30 J of kinetic energy and 10 J of thermal energy is produced by the friction between the box and the surface.
How much work is done by the force?
The table shows the work done and the time taken by four machines.
Which machine is the most powerful?
The diagram shows a manometer connected to a gas supply.
What is the pressure of the gas supply?
The diagram shows a box of dimensions 6.0 cm x 8.0 cm x 4.0 cm.
The box rests on a flat horizontal surface.
On which face must the box rest in order to exert the least pressure?
Air in a sealed syringe is slowly compressed by moving the piston. The temperature of the air stays the same.
Which statement about the air is correct?
In an experiment, smoke particles are suspended in air and viewed through a microscope.
The smoke particles move about with short random movements.
Which of the following statements is correct?
A beaker of liquid is heated slowly so that the liquid evaporates.
During evaporation, from where do the more energetic molecules leave the liquid?
Four samples of materials with the same dimensions are tested.
Which material gives the highest rate of thermal conduction?
The diagram shows a simple type of thermometer.
The roller rests on a horizontal surface and the steel bar rests on top of the roller.
When the temperature changes, the pointer rotates.
Which physical property is being used to measure temperature?
A piece of melting ice at 0 °C and a beaker of boiling water are both in a laboratory. The laboratory is at 20 °C.
What is happening to the temperature of the melting ice and what is happening to the temperature of the boiling water?
Four metal mugs with lids each contain the same volume of hot water at the same temperature.
The mugs are made from the same metal and are the same shape and size, but each has its outside surface painted with a different combination of texture and colour.
Which mug radiates thermal energy at the fastest rate?
The diagram shows a wave.
Which dimensions describe the properties of the wave?
What causes the change in direction when light travels from air into glass?
Light from a torch is incident on a plane mirror. The angle of incidence is 38°.
What is the angle of reflection?
A thin converging lens is used to produce a sharp image of a candle
Various sharp images are produced on the screen by moving the lens and the screen backward and forward.
Which statement is always correct?
Thermal radiation is part of the electromagnetic spectrum.
What is the name of this region of the spectrum?
Which process causes a sound wave to produce an echo?
A quiet sound is produced by a loudspeaker. The pitch of the sound remains constant but the loudness of the sound is increased.
Which property of the sound wave is increased?
A soft-iron bar is not magnetized. It is held close to the N pole of a magnet and then to the S pole of the same magnet
What will be the result?
A charged rod X is placed on a balance and another rod Y is brought close to it, as shown.
Which combination of charges would cause the change in the balance reading shown?
Three cores of different metals P, Q and R are placed inside identical coils of wire.
At least one of the metals is non-magnetic.
The cores are held above some iron nails.
The three diagrams show what happens when there is a current in the coils.
Which core metals are magnetic?
A length of metal wire is used as a resistor in a circuit.
Which change to the wire results in an increase in current in the circuit?
The diagram shows a circuit containing a power supply, a lamp and a motor. Three ammeters measure the current at different points in the circuit. The readings on the ammeters are I1, I2 and
Which statement about the ammeter readings is correct?
A student designs a circuit to use as a dimmer switch for a lamp.
What happens to the brightness of the lamp and the potential difference (p.d.) across the lamp, when the slider is moved from X to Y?
Which electrical component is connected in series with an electric circuit to protect it from damage by a very large current?
The diagram shows an electromagnet near a coil of wire connected to a voltmeter. The reading on the voltmeter is zero.
The switch is closed. The electromagnet magnetises quickly.
What happens to the reading on the voltmeter?
Which diagram represents the voltage output of a simple a.c. generator?
Three students are describing the structure of an atom.
student 1 All the positively charged particles are in the nucleus.
student 2 Positive electrons are in the nucleus.
student 3 Negative electrons orbit around the nucleus.
Which students are making a correct statement?
The symbol below describes a nuclide.
Which row is correct?
The diagram shows a radioactivity experiment.
When a piece of paper is used as the absorber, the count rate drops to the background count rate.
Which radiation is the source emitting?
The graph shows how the count rate from a radioactive sample changes with time.
What is the half-life for this sample?