Cambridge IGCSE Physics - 0625 - Core Paper 1 2020 Summer Zone 3

Diagram 1 shows a solid, rectangular-sided block.
[Image_1: Diagram_1]
Diagram 2 shows the same block from the front and from the side.
[Image_2: Diagram_2]
Metre rules have been shown close to the edges of the block.
What is the volume of the block?

The speed–time graph shows the motion of an object.

How far does the object travel at constant speed?

Which statement about acceleration is correct?

Two metal blocks P and Q have identical dimensions. They hang on identical spring balances.
Which statement about P and Q is correct?

Which row gives the correct weight for the mass shown?
The value of $g$ is $10 \, \text{N/kg}$.
[Table_1]

A rectangular gymnasium is 50 m long, 25 m wide and 8.0 m high.
The density of air is $1.2 \, \text{kg/m}^3$.
What is the best estimate of the mass of air in the gymnasium?

The diagram shows two of the three vertical forces acting on a hot-air balloon. The hot-air balloon is moving upwards at constant speed.

What is the air resistance acting on the hot-air balloon?

Which statement about the moment of a force is not correct?

A mass bounces up and down on a steel spring. The diagram shows the mass and the spring at different points during the motion.

At which point does the mass have the least gravitational potential energy and at which point is the most elastic energy stored in the spring?

Which energy resource stores kinetic energy?

A man can either take an escalator or a lift to travel up between two floors in a hotel.

[Image_1: escalator and lift]

The escalator takes 20 seconds to carry the man between the two floors. The useful work done against gravity is $W$. The useful power developed is $P$.
The lift takes 30 seconds to carry the same man between the same two floors.

How much useful work against gravity is done by the lift, and how much useful power is developed by the lift?

The diagram shows a solid block resting on a bench. The dimensions of the block are shown.

On which labelled surface should the block rest to produce the smallest pressure on the bench?

The diagram shows a U-shaped glass tube, closed at one end by a tap. The glass tube contains a liquid as shown.



Some of the trapped gas is removed. What will happen to the levels X and Y?

What is the correct particle diagram for a solid?

A sealed box contains a fixed mass of gas.
Which action results in each molecule of the gas colliding with the walls of the container less frequently and with a smaller force?

The diagram shows a liquid-in-glass thermometer.

Which row gives the correct labels for the thermometer?

The diagrams show four blocks of steel. The blocks are all drawn to the same scale.
The same quantity of thermal energy is given to each block.
Which block shows the greatest rise in temperature?

A gas is cooled so that its molecules move more slowly, come closer together and do not move freely. Which process is being described?

The diagram shows a vacuum flask used to keep a liquid warm.

Which methods of heat loss are reduced by the vacuum between the silvered walls?

Equal volumes of water at 100°C are put in four containers. Two containers have matt black sides and two containers have shiny white sides. One of each type of container has a lid.
The containers are left for two minutes.
Which container has the highest temperature?

The diagram shows a wave.
What are the amplitude and the wavelength of this wave?
[Table_1]

Waves travel more quickly on the surface of water when the water is deep.
A stone is dropped at point X into a pool of varying depth. The diagram shows the first three wavefronts on the surface of the pool.
The region between X and which labelled point is likely to be the deepest?

The diagram shows a ray of light incident on a plane mirror.
The angle between the ray and the mirror is 35°.
The ray is reflected by the mirror.
What is the angle of reflection?

A beam of white light is split into a spectrum of seven colours. Which name is given to this process?

An intruder alarm sensor detects that a person is warmer than his surroundings.
Which type of electromagnetic wave does the sensor detect?

A tuning fork produces a sound when it vibrates.
What is the effect on the sound produced when the tuning fork vibrates more times every second and with a larger amplitude?

The diagram shows a magnet with some plotting compasses. The compasses show the direction of the magnetic field of the magnet.
Which plotting compass has the needle pointing in the wrong direction?

Four nails A, B, C, and D are tested to find which makes the strongest permanent magnet.
One of the nails is placed against a bar magnet and the number of paper clips which the nail can support is recorded.

The bar magnet is then removed and the number of paper clips remaining attached to the nail is recorded. Each nail is tested individually.
Which nail becomes the strongest permanent magnet?
[Table_1]

The diagram shows a positively charged conducting sphere and a wire connected to earth.
What happens when the wire is touched onto the sphere?

Three electrical quantities are listed.
• potential difference
• electromotive force
• current
Which quantities are measured in volts?

A student uses the circuit shown to determine the resistance of two identical resistors.
The voltmeter reading is 2.2 V and the ammeter reading is 0.25 A. What is the resistance of each resistor?

The diagram shows part of a circuit containing three identical lamps.
At which two points do the currents have the same value?

Which circuit contains a thermistor and a heater?

A student constructs four circuits, each containing a fuse.
The fuse blows in one circuit and both lamps in the circuit go out.
In which circuit does the fuse blow and both lamps go out?

The graphs show how the currents in three circuits vary with time.
In which circuits is there a direct current?

The diagram represents the transmission of electricity from a power station to homes that are many kilometres away. Two transformers are labelled X and Y.

What type of transformers are X and Y?

A nuclide of the element iron has the symbol shown. $$^{56}_{26}\text{Fe}$$
What does a neutral atom of this nuclide contain?

The diagram shows an early model of the structure of an atom.

This early model is different from the atomic model accepted today.
Which statement about the early model is not included in the model accepted today?

A thin sheet of paper is placed between a radioactive source and a radiation detector. The count rate falls to a very low reading.
From this result, which type of radiation is the source emitting?

Why should all radioactive materials be handled carefully?