Cambridge IGCSE Physics - 0625 - Core Paper 1 2016 Summer Zone 3

The diagram shows an enlarged drawing of the end of a metre rule. It is being used to measure the length of a small feather.
What is the length of the feather?

An object moves at a constant speed for some time, then begins to accelerate.
Which distance-time graph shows this motion?

A car travels at an average speed of 60 km/h for 15 minutes.
How far does the car travel in this time?

A heavy object is released near the surface of the Earth and falls freely. Air resistance can be ignored. Which statement about the acceleration of the object due to gravity is correct?

A cup contains hot liquid.
Some of the liquid evaporates.
What happens to the mass and what happens to the weight of the liquid in the cup?
[Table_1]

Diagram 1 shows a measuring cylinder containing water.
Diagram 2 shows the same measuring cylinder and water after 10 identical solid glass spheres have been added.
!
The mass of one of the spheres is 10 g.
What is the density of the glass from which the spheres are made?

A feather falls through the air. Its downward speed is constant.
Which statement about the feather is correct?

The diagram shows an L-shaped piece of card suspended freely from a pin at B.
When the card is pushed, it swings and then comes to a stop in the position shown.
At which labelled point is the centre of mass of the card?

A skier walks from the bottom of a ski slope to the top and gains 10 000 J of gravitational potential energy.
She skis down the slope. At the bottom of the slope, her kinetic energy is 2000 J.



How much energy is dissipated in overcoming friction and air resistance as the skier moves down the slope?

Which energy source is renewable and reliably available at all times?

Two workers are stacking cans on to a shelf in a shop. The workers lift the same number of identical cans on to the same shelf from the same level.
Worker P takes 3.0 minutes to lift the cans. Worker Q takes 4.0 minutes to lift the cans.
Which statement about the workers is correct?

The diagram shows four solid pieces of the same metal. Each piece has the same thickness and stands on a bench as shown. Which piece of metal produces the greatest pressure on the bench?

The diagram shows a simple mercury barometer.
The atmospheric pressure increases.
Which distance increases?

What causes the random, zig-zag movement (Brownian motion) of smoke particles suspended in air?

A sealed bottle of constant volume contains air.
The air in the bottle is heated by the Sun.
What is the effect on the average speed of the air molecules in the bottle, and the average distance between them?

The melting points of ethanol and mercury are shown.

[Table_1]

Which of these two liquids is/are suitable to use in a liquid-in-glass thermometer to measure temperatures of −50°C and −120°C?

A jug of water is at room temperature.
Several ice cubes at a temperature of 0°C are dropped into the water and they begin to melt immediately.
What happens to the temperature of the water and what happens to the temperature of the ice cubes while they are melting?
[Table_1]

Which quantity gives the thermal capacity of a beaker?

A student suggests some uses for containers made from good thermal conductors and for containers made from poor thermal conductors.
In which row are both suggested uses correct?
[Table_1]

A rod is made half of glass and half of copper. Four pins A, B, C and D are attached to the rod by wax. The rod is heated in the centre as shown.
The pins fall off when the wax melts.
Which pin falls off first?

Which row shows the natures of light waves, sound waves and X-rays?
[Table_1]

Radio waves are received at a house at the bottom of a hill.



The waves reach the house because the hill has caused them to be

The diagram shows an object in front of a plane mirror.
At which labelled position is the image of the object formed?

White light enters a glass prism. The light leaving the other side of the prism is separated into colours.

Which row correctly describes what happens?

Which range of wave frequencies includes only sounds that can be heard by a human with normal hearing?

A candle flame is placed in front of a loudspeaker.
The loudspeaker produces a sound wave that causes air particles to vibrate. The vibrating air particles make the candle flame vibrate in the same direction as the air particles.
[Image_1: Diagram of loudspeaker and candle flame]
Which row shows the direction of vibration of the candle flame, and the nature of sound waves?

Which statement about magnetism is correct?

A student wishes to make a permanent magnet. She has an iron rod and a steel rod.
Which rod should she use to make the permanent magnet, and is this rod a hard magnetic material or a soft magnetic material?
[Table_1]

A flexible electrical cable consists of a central conductor and outer insulation.

Which pair of materials is suitable for the cable?

The diagram shows a battery connected to two resistors.
Four students separately measure the electromotive force (e.m.f.) of the battery, the current in the resistors, and the potential difference (p.d.) across resistor R.
Their results are shown in the table below.
Which row shows values with their correct units?

| e.m.f. | current | p.d. |
| A | 3.0A | 0.30V | 1.5A |
| B | 3.0A | 0.30 A | 1.5V |
| C | 3.0V | 0.30V | 1.5A |
| D | 3.0V | 0.30A | 1.5V |

Why are lamps in a house lighting circuit connected in parallel rather than in series?

The diagram shows a cell connected to two 6.0 $\Omega$ resistors. Three currents, $I_1$, $I_2$ and $I_3$, are labelled.

Which row correctly compares $I_2$ and $I_3$ with $I_1$?

The diagram shows part of a circuit used to switch street lamps on and off automatically.
In the evening it gets dark.
Which row shows the effect on the resistance of the light-dependent resistor (LDR) and on the potential difference (p.d.) across it?
[Table_1]

A domestic circuit includes a 30A fuse. This protects the wiring if there is too much current in the circuit.
In which wire is the 30A fuse positioned, and what does it do when it operates?
[Table_1]

A strong electromagnet is used to attract pins. What happens when the current in the coil is halved?

The diagram shows a transformer.

The input voltage is 240V.
What is the output voltage?

A proton and a neutron are each close to a positive nucleus.
How does the charge on the nucleus affect the proton and the neutron, if at all?

Below are four statements about isotopes of a certain element.
Which statement about the isotopes must be correct?

Radioactive materials should be handled carefully.
Which safety precaution does not reduce the risk to people using a radioactive material?

A sample of a radioactive isotope has an initial rate of emission of 128 counts per minute and a half-life of 4 days.
How long will it take for the rate of emission to fall to 32 counts per minute?