Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2016 Summer Zone 2

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?

A car travels along a straight road.
The speed-time graph for this journey is shown.
During which labelled part of the journey is the resultant force on the car zero?

A large stone is dropped from a bridge into a river. Air resistance can be ignored.
Which row describes the acceleration and the speed of the stone as it falls?
[Table_1]

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]

Below are four statements about acceleration.
Which statement is not correct?

The diagram shows a non-uniform beam of weight 120 N, pivoted at one end. The beam is kept in equilibrium by force F.

What is the value of force F?

An object is acted upon by a 3 N force and by a 4 N force. Each diagram shows the two forces. Which diagram also shows the resultant X of these two forces?

The engine of a car produces a driving force of 5000N on the car. Resistive forces $R$ also act on the car, as shown.
The car has a mass of 800 kg and an acceleration of $1.0 \text{ m/s}^2$.
What is the value of $R$?

A stone of mass $m$ is held at rest in water. The stone is released and falls vertically a distance $h$. The stone reaches a speed $v$.
Some of the original energy of the stone is transferred to the water. As it falls, resistive forces cause the temperature of the water and stone to increase.
Which expression gives the work done against the resistive forces?

Which energy resource does not derive its energy from the Sun?

Some processes are more efficient than others.
Which expression gives the efficiency of a process?

A diver under water uses breathing apparatus at a depth where the pressure is $1.25 \times 10^5 \text{Pa}$.
A bubble of gas breathed out by the diver has a volume of $20 \text{cm}^3$ when it is released. The bubble moves upwards to the surface of the water.
At the surface of the water, the atmospheric pressure is $1.00 \times 10^5 \text{Pa}$.
The temperature of the water is the same at all depths.
What is the volume of this bubble when it reaches the surface?

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

Which statement describes what happens as ice at 0°C starts to melt to become water?

Smoke particles, illuminated by a bright light, are seen through a microscope. They move about randomly.
What causes this motion?

A liquid is at a temperature below its boiling point. The liquid is then heated so that it becomes a gas at a temperature above its boiling point. Which row correctly compares the liquid with the gas?
[Table_1]

A beaker of liquid is left on a laboratory bench. There is an electric fan in the laboratory causing a draught over the liquid.
The liquid evaporates.
Which row shows two changes that will both cause the liquid to evaporate more quickly?
[Table_1]

Which processes occur in a metal to cause thermal conduction?
[Table_1]

A wooden beam is painted part black and part white. The beam absorbs infra-red radiation from the Sun during the day, and loses infra-red radiation to the surroundings at night.
Which part of the beam heats up more quickly during the day, and which part cools down more quickly at night?

5.0 g of water at 25°C is dropped onto a large block of ice at 0°C. The water cools to 0°C and some of the ice melts.
Assume that all the energy lost by the water is gained by the ice.
What is the mass of ice that melts?
The specific heat capacity of water is 4.2 J/(g°C).
The specific latent heat of fusion of ice is 340 J/g.

The frequency of a wave is doubled. The speed of the wave does not change. What happens to the wavelength of the wave?

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

The diagram shows light passing from air into glass.
The glass has a refractive index of 1.5.
What is the angle of refraction in the glass?

Visible light has a frequency of approximately $5.0 \times 10^{14}\text{ Hz}$. M and N are two other types of electromagnetic radiation. The frequency of M is $5.0 \times 10^{6}\text{ Hz}$.
The frequency of N is $5.0 \times 10^{15}\text{ Hz}$.
Which types of radiation are M and N? [Table_1]

The diagram shows a converging lens forming an image of an object.
Which statement about the image is correct?

A small potential difference $V$ is applied across a filament lamp. The current $I$ in the lamp is measured. $V$ is increased in stages and $I$ is measured at each stage. Which graph shows the results obtained?

A resistor of resistance $R$ is connected to a battery of e.m.f. $V$.
There is a current $I$ in the resistor.
Power $P$ is dissipated by the resistor, and in time $t$ the energy transferred is $E$.
Which expression is correct?

A wire has a certain electrical resistance.
The diameter and length of the wire may be changed.
Which pair of changes must cause the resistance of the wire to increase?
[Table_1]

The four circuits shown all include an a.c. power supply, two diodes and a lamp.
In which circuit is there a rectified current in the lamp?

P and Q are the circuit symbols for two electrical components.
Which components are represented by P and by Q?
[Table_1]

The diagram shows a combination of logic gates.
Input P is at a logic state 0 (low) and input Q is at a logic state 1 (high).
What are the logic states at output X and at output Y?

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?

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?

The diagram shows a shaded area where the direction of a magnetic field is into the page.
A beam of $\beta$-particles enters the field as shown.
In which direction is the beam of $\beta$-particles deflected as they enter the magnetic field?

A very important experiment increased scientists’ understanding of the structure of matter. In the experiment, particles scattered as they passed through a thin metal foil. Which particles were used, and to which conclusion did the experiment lead? [Table_1]

Below are the symbols for five different nuclides.
\(\begin{array}{cccc}\ ^{35}_{17}\text{X} & ^{37}_{17}\text{X} & ^{38}_{18}\text{X} & ^{81}_{35}\text{X} & ^{81}_{37}\text{X}\end{array}\)
Which two nuclides are isotopes of the same element?

A radioactive decay can be represented as shown. $$^{233}_{91}\text{Pa} \rightarrow ^{233}_{92}\text{U}$$ The equation is incomplete. In this decay, the nucleus changes by

The graph shows how the decay rate of a radioactive source changes with time.



What will be the decay rate at 8 days?