Cambridge IGCSE Physics - 0625 - Core Paper 1 2014 Winter Zone 1

Diagram 1 shows a measuring cylinder containing water.
Five identical steel balls are now lowered into the measuring cylinder. Diagram 2 shows the new water level in the cylinder.

What is the volume of each steel ball?

The graph shows how the speed of a car changes with time.
Between which two times is the car stationary?

A man stands by a railway track.

A train travelling at 40 m/s takes 2.0 s to pass the man.
What is the length of the train?

The mass of an astronaut is 70 kg on the Moon.
What is the mass of the astronaut on the Earth?

The weight of an object is found using the balance shown in the diagram. The object is put in the left-hand pan and various weights are put in the right-hand pan.


These are the results:
[Table_1]

What is the best estimate of the weight of the object?

The diagram shows the dimensions of a rectangular block of metal of mass $m$.

Which expression is used to calculate the density of the metal?

In which situation is no resultant force needed?

Which properties of a body can be changed by applying a force to the body?

The list contains three energy resources P, Q, and R.
P geothermal energy from hot rocks
Q nuclear fission in reactors
R sunlight on solar panels
Which of these resources are renewable?

The diagram shows three different containers J, K, and L. Each container contains water of the same depth.
Which statement about the pressure of the water on the base of each container is correct?

Which movement will require the greatest amount of work to be done?

A water manometer is connected to a gas supply.
There is a gas leak and the pressure of the gas supply falls.
What happens to the water level at P and what happens to the water level at Q?

The diagram shows a beaker of water. Four molecules are labelled. The relative amount of energy of each molecule is shown.
Which molecule is most likely to escape from the liquid?

Some gas is trapped in a container of fixed volume.
The temperature of the gas increases.
Which graph shows how the pressure of the gas changes with temperature?

Which points are the fixed points of the liquid-in-glass thermometer shown?

Equal masses of two different liquids are put into identical beakers.
Liquid 1 is heated for 100 s and liquid 2 is heated for 200 s by heaters of the same power.
The temperature of both liquids increases by the same amount.



Which statement is correct?

The metal surface of a kettle is hot. What happens to the cool air outside the kettle when it comes into contact with the hot kettle?

One type of double glazing consists of two panes of glass separated by a vacuum.

Which method or methods of energy transfer are prevented by the vacuum?

The diagram shows four waves drawn to the same scale.
Which statement is correct?

Light waves pass from air into glass and are refracted. What always remains constant when this happens?

Which type of electromagnetic wave is used in airport security scanners?

Which waves are longitudinal?

An object is placed in front of a converging lens. The lens has a focal length $f$.
The lens produces a real, enlarged image of the object.
In which labelled position is the object placed?

A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch. What effect does this have on the amplitude and on the frequency of the sound waves that the alarm produces? [Table_1]

In an experiment to measure the speed of sound, a student uses a stopwatch to find the time taken for a sound wave to travel from X to Y. She does this six times.

The table shows her results.
| measurement | time /s |
|-------------|--------|
| first | 0.5 |
| second | 0.7 |
| third | 0.6 |
| fourth | 0.4 |
| fifth | 0.9 |
| sixth | 0.5 |
Which value for the time should be used to calculate the speed of sound?

The ends of three metal rods are tested by holding end Q of rod 1 close to the others in turn.

The results are as follows.
End Q: attracts end R,
attracts end S,
attracts end T,
repels end U.
Which of the metal rods is a magnet?

A permanent magnet is made from metal and an electromagnet uses a metal core. Which metal is suitable for each of these purposes? [Table_1]

Which row gives the unit for energy and the unit for electromotive force (e.m.f.)?
[Table_1]

A student carries out an experiment to investigate the resistance of a resistor R. She takes a series of readings of potential difference (p.d.) and current, and plots a graph of her results.
Which circuit should she use?

The diagram shows a circuit with a 3.0Ω resistor and a 2.0Ω resistor connected in parallel.

The switch is open, and the ammeter reads 2.0A.
The switch is now closed and the ammeter reads the total current in both resistors.
What is the ammeter reading with the switch closed?

The diagram shows a torch containing two cells, a switch and a lamp. Which is the circuit diagram for the torch?

An engineer uses the potential divider shown in the diagram. He needs the output voltage to be one tenth $\left(\frac{1}{10}\right)$ of the input voltage.

Which pair of values could he use for the two resistors X and Y?

The current in a kettle is 10A and it is protected by a 13A fuse. The owner of the kettle replaces the 13A fuse with a 3A fuse. What happens when the kettle is switched on?

The diagram shows cables used in the transmission of electrical energy. High voltages are used for the transmission.
Why are high voltages used for the transmission of electrical energy?

Which diagram shows the magnetic field pattern around a wire that is carrying a current perpendicular to the page?

The diagram shows a simple transformer with an input of 240V and an output of 40V. There are 600 turns on the primary coil.

How many turns are there on the secondary coil?

In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles?

The diagram shows a radioactive source, a thick aluminium sheet and a radiation detector.

The radiation detector shows a reading greater than the background reading.
Which type of radiation is being emitted by the source and detected by the detector?

The count rate from a radioactive isotope is recorded every hour. The count rate is corrected for background radiation.
The table shows the readings.

[Table_1]

What estimate of the half-life of the isotope can be obtained from the readings in the table?

A nuclide is represented by the symbol ${}_{Q}^{P}X$.
How many neutrons are in one nucleus of the nuclide?