Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2016 Winter Zone 1

The graph shows how the distance travelled by a vehicle changes with time.
Which row describes the speed of the vehicle in each section of the graph?

A stone falls freely from the top of a cliff. Air resistance may be ignored.
Which graph shows how the acceleration of the stone varies with time as it falls?

A car travels along a horizontal road in a straight line. The driver presses the accelerator to increase the speed of the car. The speed-time graph for the car is shown. What is the acceleration of the car?

A spaceship approaches the Earth from deep space. Near the Earth, a force on the spaceship causes it to have weight. This causes it to change its speed and direction.
Which type of force causes the spaceship’s weight, and which property of the spaceship resists its change in speed and direction?

[Table 1]

The diagrams show an empty rectangular box, and the same box filled with liquid.
The box has a mass of 60 g when empty. When filled with liquid, the total mass of the box and the liquid is 300 g.

The density of the liquid is 1.2 g/cm³.
What is the volume of the liquid in the box?

An object travels in a circular path at constant speed.
Which statement about the object is correct?

Which diagram shows the magnitude and direction of the resultant $R$ of the two forces $F_1$ and $F_2$?

Two cars, P and Q, have different masses and different speeds as shown. Which row correctly compares the momentum and the kinetic energy of P with the momentum and the kinetic energy of Q?

A car of mass 800 kg travels over a hill of height $h$.
By travelling to the top of the hill, the car gains 40000 J of gravitational potential energy.
The gravitational field strength $g$ is 10 N/kg.
What is the height $h$ of the hill?

A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings. What is the efficiency of the lamp?

The box contains the names of eight different energy resources.

[Table_1]

natural gas, geothermal, solar, waves, hydroelectric, oil, wind, coal

How many of these energy resources are renewable?

The diagram shows a dam holding back water.

The depth of the water is 65 m.
The density of the water is 1000 kg/m³. The gravitational field strength $g$ is 10 N/kg.
What is the pressure exerted at the base of the dam due to the water?

Air is trapped in a cylinder by a piston. The original volume of the trapped air is $V$ and the original pressure of the trapped air is $P$. The piston is pushed to the left. The temperature of the gas does not change.



What is the new volume and what is the new pressure of the trapped air?

When a liquid evaporates, some of its molecules escape from the surface and the temperature of the liquid changes.
Which row describes the escaping molecules and the change in temperature of the liquid?

[Table_1:
| escaping molecules | temperature of the liquid |
|--------------------|---------------------------|
| A less energetic | goes down |
| B less energetic | goes up |
| C more energetic | goes down |
| D more energetic | goes up | ]

A gas at a constant temperature is in a container of fixed volume. The gas exerts a pressure on the walls of the container. The pressure is caused by the gas molecules striking the walls.
Which statement about the gas molecules when they strike the walls is correct?

A piece of melting ice at $0^{\circ}C$ and a beaker of boiling water are both in a laboratory. The laboratory is at $20^{\circ}C$.



What is happening to the temperature of the melting ice and what is happening to the temperature of the boiling water?

The diagram shows a liquid-in-glass thermometer.
Which feature would give a thermometer with an increased range?

A copper container of mass 0.20 kg contains 0.10 kg of water. The specific heat capacity of copper is 385 J/(kg °C) and the specific heat capacity of water is 4200 J/(kg °C). How much energy, in joules, is needed to raise the temperature of the copper container and the water by 10°C?

The thermal transfer of energy through a copper rod involves electrons.
A second process is also involved.
What is this method of thermal energy transfer, and what is the second process?
[Table_1]

The diagrams show four spherical objects at the same temperature. Two of the objects are small and two are large. Two of the objects are white and two are black.
Which object emits infra-red radiation at the greatest rate?

The diagram represents plane wavefronts being diffracted by passing through a gap in a barrier. Which pair of changes must increase the amount of diffraction that occurs?

An image is formed by a plane mirror. A second image is formed by a lens used as a magnifying glass.
Which row states the nature of each of these images?
[Table_1]

Light travelling at a speed of $3.0 \times 10^8 \, m/s$ strikes the surface of a glass block and undergoes refraction as it enters the block. The diagram shows a ray of this light before and after it enters the block.
What is the speed of light in the glass?

Radiation from which part of the electromagnetic spectrum is used in the remote controller for a television?

A girl notices that, when she shouts into a cave, she hears an echo.
Which wave property causes the echo?

The diagrams represent the displacement in four different sound waves. All the diagrams are drawn to the same scale.
Which diagram represents the sound with the highest pitch?

A student suggests three methods for demagnetising a piece of steel.
1. placing it in an east-west direction and hammering it hard
2. placing it in an east-west direction and heating it until red hot
3. removing it slowly from a coil carrying alternating current
Which of the methods will demagnetise the piece of steel?

In two separate experiments, a magnet is brought near to an unmagnetised iron bar. This causes the bar to become magnetised.



Which magnetic pole is induced at X and at Y?

A polythene 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 provides options]

The diagram shows a lamp in a circuit.

Which change to the circuit would increase the current in the lamp?

A 12.0Ω resistor and a 6.0Ω resistor are connected in parallel. Another 6.0Ω resistor is then connected in series with the parallel combination. What is the combined resistance of all three resistors?

The circuit shows a 12V battery connected to a lamp of resistance 3.0Ω.
How much energy is transferred to the surroundings by the lamp in 2.0 minutes?

The diagram shows a circuit containing a battery, a resistor with high resistance, a switch and a lamp.
Initially the switch is open.
What happens to the lamp when the switch is closed?

This is the truth table for a logic gate.
[Table_1]
Which symbol represents the logic gate?

Why is a fuse used in an electrical circuit?

An electric current can produce a heating effect and a magnetic effect.
Which row shows the effect that a relay uses and one application of a relay?
[Table_1]

A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved $\alpha$-particles being fired at a thin gold foil. What happened?

What is meant by nuclear fusion?

A nucleus undergoes radioactive decay. The proton number increases by one. The nucleon number does not change.
Which particle has been emitted in this decay?

Radioactive source S emits $\alpha$-particles, $\beta$-particles and $\gamma$-rays. A detector is placed 5 cm away from S. A thin sheet of paper is placed as shown in the diagram. Which emissions from the source can be detected?