Cambridge IGCSE Physics - 0625 - Core Paper 1 2010 Summer Zone 2

A student uses a stopwatch to time a runner running around a circular track. The runner runs two laps (twice around the track). The diagrams show the reading on the stopwatch when the runner starts running, at the end of the first lap, and at the end of the second lap.

What is the time taken for the runner to run the second lap?

A snail moves along a ruler. It takes 20 s to move from Q to R.

What is its average speed from Q to R?

A scientist needs to determine the volume of a small, irregularly shaped rock sample. Only a rule and a measuring cylinder, partially filled with water, are available.

To determine the volume, which apparatus should the scientist use?

The diagram shows a rectangular block of density $2 \text{ g/cm}^3$.
What is the mass of the block?

Two distance/time graphs and two speed/time graphs are shown. Which graph represents an object that is at rest?

Which statement about a moving object is correct?

An experiment is carried out to measure the extension of a rubber band for different loads.
The results are shown below.

[Table_1]

load / N | 0 | 1 | 2 | 3
length / cm | 15.2 | 16.2 | 18.6 |
extension / cm | 0 | 1.0 | 2.1 | 3.4

Which figure is missing from the table?

Two blocks of metal X and Y hang from spring balances as shown in the diagram.

What does the diagram show about X and Y?

The graph shows how weight varies with mass on planet P and on planet Q.

An object weighs 400 N on planet P. The object is taken to planet Q.
Which row is correct?
[Table_1]

A man lifts 20 bricks, each of weight 6 N.
What other information is needed to calculate the useful work done in lifting the bricks?

To prevent a cement mixer sinking into soft ground, the mixer is placed on a large flat board.



Why does this prevent the mixer sinking?

The pressure of a gas is measured using a manometer as shown in the diagram . The mercury in the manometer is replaced with a liquid which is less dense. How does the value of $h$ change?

A thermometer has a scale which starts at −10°C and ends at 110°C.
What is the value of the lower fixed point and of the upper fixed point of the scale?

Energy is stored in a battery and in a box of matches.
Which type of energy is stored in each of them?
[Table_1]

Hot liquid in a vacuum flask cools extremely slowly. This is because some methods of heat transfer cannot take place in a vacuum.
Which methods cannot take place in a vacuum?

A teacher demonstrates convection currents using a box with two chimneys and a lighted candle. She holds a smoking taper at point P.
In which direction does the convection current cause the smoke to move?

The diagram represents the molecules of a gas in a closed container of constant volume.
What happens to the molecules when the gas is heated?

A liquid is left in an open dish. After several days there is less liquid in the dish. Which statement explains this?

A student carries out an experiment to find the melting point of wax. The graph shows how the temperature of the wax changes as it cools.
[Image_1: Graph showing temperature vs time with points X, Y, and Z]
Which statement is correct?

Which waves are longitudinal?

A police car siren emits two different sounds P and Q. These are produced alternately. The diagram represents the sounds emitted:
Which sound is the louder and which has the lower pitch?

What is the approximate value of the highest frequency that can be heard by a young person?

A navigation buoy floating on the sea oscillates up and down as a wave passes.
In exactly two minutes, six complete wavelengths pass the buoy.
What is the frequency of the waves?

Which diagram correctly shows rays of light passing through a converging lens in a camera?

The diagram shows a ray of light incident on the edge of a piece of glass. The angle $i$ is bigger than the critical angle.
Which arrow correctly shows the direction of the ray after it leaves the edge of the glass?

A magnet attracts two pieces of iron.

What is the arrangement of the induced poles in the pieces of iron?

A coil is connected to a battery and a soft iron bar is hung near to it. The current is then reversed by reversing the battery connections. How does the soft iron bar behave in the two cases?

A piece of iron and a piece of steel are picked up by an electromagnet as shown.
The current to the electromagnet is switched off.
What happens?

A lamp is connected in four circuits in turn, each using identical batteries. The resistors are all identical. In which circuit will the lamp be brightest?

A circuit is set up to measure the resistance of a resistor R. The meter readings are 2.0 A and 3.0 V.
What is the resistance of the resistor R?

The table shows the lengths and diameters of four copper wires.
Which wire has the least resistance?
[Table_1]

The circuit shown is a potential divider.

What is component X?

A transformer has 15 000 turns on its primary coil and 750 turns on its secondary coil.
Connected in this way, for what purpose could this transformer be used?

After some building work in a house, a bare (uninsulated) live wire is left protruding from a wall.
What is the greatest hazard?

Which diagram shows the correct positions for both the switch and the fuse?

The nuclide notation for radium-226 is $^{226}_{88}Ra$.
How many electrons orbit the nucleus of a neutral atom of radium-226?

A radioactive substance has a half-life of 2 weeks. At the beginning of an investigation the substance emits 3000 $\beta$-particles per minute.
How many $\beta$-particles will it emit per minute after 6 weeks?

Which row describes the properties of $\alpha$-particles? [Table_1]

What are cathode rays?

A cathode-ray tube has an anode and an earthed cathode. Which row shows the charge on the anode and the temperature of the cathode? [Table_1]