Cambridge IGCSE Physics - 0625 - Core Paper 1 2009 Winter Zone 2

A car accelerates from traffic lights. The graph shows the car’s speed plotted against time.
How far does the car travel before it reaches a constant speed?

Which property of a body can be measured in newtons?

A stopwatch is used to time an athlete running 100 m. The timekeeper forgets to reset the watch to zero before using it to time another athlete running 100 m.



How long does the second athlete take to run 100 m?

A ball is thrown upwards.
What effect does the force of gravity have on the ball?

The diagrams show a rectangular box with inside measurements of 5 cm \times 6 cm \times 4 cm. The box has a mass of 40 g when empty. When filled with a liquid, it has a total mass of 220 g.
What is the density of the liquid?

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

The object in the diagram is acted upon by the two forces shown.
[Image_1: Diagram showing an object with 3N force to the left and 2N force to the right]
What is the effect of these forces?

Passengers are not allowed to stand on the upper deck of double-decker buses.



Why is this?

The table shows the times taken for four children to run up a set of stairs.
Which child's power is greatest?
[Table_1]

The diagram shows a microphone being used in an interview. Which energy change takes place in the microphone?

The diagrams show two swimming pools. One contains fresh water and the other contains salt water. Salt water is more dense than fresh water.
At which labelled point is the pressure the greatest?

A water manometer is used to measure the pressure of a gas supply to a house. It gives a reading of $h$ cm of water.
Why is it better to use water rather than mercury in this manometer?

To mark a temperature scale on a thermometer, standard temperatures known as fixed points are needed.
Which of these is a fixed point?

The table gives the melting points and boiling points of glycerine and benzene.
[Table_1: melting point and boiling point data for glycerine and benzene]
At which temperature will both glycerine and benzene be liquid?

Brownian motion is observed by looking at smoke particles through a microscope. How do the smoke particles move in Brownian motion?

A small amount of air is introduced into the vacuum above the mercury in a mercury barometer tube. The mercury level goes down. Why does the mercury level go down?

A student warms her hands near a fire.

Which waves carry most heat to her hands and are these waves electromagnetic?

A beaker contains water at room temperature.



How could a convection current be set up in the water?

Which range of frequencies typically can be heard by a 10 year-old child?

Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in space.
Compared with the sound heard if they were working on Earth, what does astronaut 2 hear?

The diagram shows a wave. Which labelled distance is the wavelength?

Sound waves travel from a point X to another point Y.
Which diagram represents the movement of the air molecules, caused by the sound waves, in the region between X and Y?

An object O is placed in front of a converging lens of focal length $f$. At which point will the top of the image be seen?

A ray of light in glass is incident on a boundary with air.
Which path does the ray of light take when the angle of incidence $i$ is less than the critical angle?

A pupil measures the potential difference across a device and the current in it.
Which calculation gives the resistance of the device?

A student uses a length of wire as a resistor. He discovers that the resistance of the wire is too small. To be certain of making a resistor of higher value, he should use a piece of wire that is

A permanent magnet is brought near to a piece of copper. The copper is not attracted by the magnet.
Why is there no attraction?

Four plotting compasses are placed in the magnetic field of two identical bar magnets as shown in the diagram.
Which compass is shown pointing in the wrong direction?

The diagram shows a torch containing two cells, a switch and a lamp.

What is the circuit diagram for the torch?

The diagram shows a battery connected to two identical resistors. Three ammeters M_1, M_2 and M_3 are connected in the circuit.

Meter M_1 reads 1.0A.
What are the readings on M_2 and on M_3?

A certain electrical appliance is powered from a mains supply. The appliance normally uses a current of 3 A, but the current briefly rises to 4 A at the instant the appliance is switched on. The cable to the appliance is designed for currents up to 6 A.
The fuses available to protect the cable are rated at 1 A, 3 A, 5 A and 13 A.
Which fuse should be used?

An electrical component X is placed in water, as shown.
When the temperature of the water is increased, the reading on the ammeter increases.
What is component X?

Which device is designed to allow a small direct current (d.c.) to control a large direct current (d.c.)?

On a building site, metal scaffolding is firmly embedded in the damp ground. A builder holds a mains-operated electric drill in one hand. With his other hand he holds on to the scaffolding. The power cable of the drill is damaged where it enters the metal casing of the drill. What danger does this present to the builder?

The diagram shows a beam of cathode rays entering an electric field. In which direction is the beam deflected by the field?

To create cathode rays in a vacuum, what might be a suitable potential difference to connect between the cathode and anode?

A transformer is to be used to provide a 10V output from a 100V supply.

What are suitable numbers of turns for the primary coil and for the secondary coil?

How many neutrons and how many protons are contained in a nucleus of $^{238}_{92} ext{U}$?
[Table_1]

Which statement explains the meaning of the half-life of a radioactive substance?

The diagram shows the paths of three different types of radiation, X, Y and Z.

Which row in the table correctly identifies X, Y and Z?