Which particles move to causea current ina copper wire?

The list gives three properties of different states of matter.

1. They cannot be compressed significantly.
2. They can flow.
3. They always completely fill their container.

Which properties are correct for liquids?

A student investigates the rate of emission of thermal radiation by four metal containers, W,
X. Y, and Z. The metal containers are identical except for the texture and colour of their
surfaces.
The student fills the metal containers with equal volumes of water atthe same temperature.

The graph shows how the temperature of the water in the containers varies with time.

Which row correctly identifies the four surfaces?

A student stands at a distance d from a wall. He claps his hands and hears an echo 1.2 s
later.

What is the approximate value of d?

Gases, liquids and solids are made up of small particles.

Which row gives the relative separation of the particles?

Which statement correctly compares radio waves and X-rays?

The diagram shows a deep reservoir formed by a dam.

On what does the pressure at X depend?

A girl is sitting on a rock in the sea looking at passing waves. She notices that five complete
wavelengths pass her in 20 s.

What is the frequency of this wave?

An object O is placed at point P near to a thin converging lens. The diagram shows three rays
from the top of O passing through the lens. Each point F is one focal length from the centre of the lens. Each point 2F is two focal lengths from the centre of the lens.

The object O is moved to point Q on the diagram.
Which type of image is produced when the object O is at point Q?

Astudent usesa thin converging lens with a focal length f of 10 cm to produce a real, inverted, and magnified image of an object.

Where must the object be placed?

The diagram shows a uniform metre rule. The rule is pivoted at its mid-point. A weight of 4.0 N is suspended from the rule at the 5 cm mark. The rule is held by a string at the 30 cm mark. The rule is in equilibrium.

What is the upward force that the string exerts on the rule?

An electric heater with a power rating of 2000 W is switched on for 3.0 hours. The cost of
1 kWh of electricity is 20 cents.

What is the total cost of using the heater?

Background radiation is the radiation that is always present in the environment cosmic rays, radon gas, medical X-raysaround us.

Which list contains only natural sources of background radiation?

A current-carrying coil in a magnetic field experiences a turning effect.
Three suggestions for increasing the turning effect are given.

1. Increase the number of turns on the coil.
2. Increase the current in the coil.
3. Increase the strength of the magnetic field.

Which suggestions are correct?

Point X is near to a bar magnet, as showп

Which arrow indicates the direction of the magnetic field of the bar magnet at point X?

In a shallow tank, a water wave moves through a barrier with a narrow gap. The diagram
shows thewaves on the left-hand side and the right-hand side of the barrier.

Which term describes the effect shown?

Two students, X and Y, race up the same flight of stairs. Student X hasa greater mass than
student Y. They both start from rest and develop the same average power during the race.

Which student reaches the top of the stairs first and why?

A lump of modelling clay is moved froma small measuring cylinder to a large measuring cylinder that has twice the diameter.

The reading on the small measuring cylinder goes down by 20 cm³.

By how much does the reading on the large cylinder go up?

A card is placed in front ofa plane mirror so that its label is facing the mirror, as shown.

How does the image of the label formed by the mirror appear to the observer?

The diagram shows a bar magnet and four plotting compasses.

Which compass correctly shows the direction of the magnetic field due to the magnet?

An object is placed in front of a converging lens. The lens has a focal length f.

In which labelled position should the object be placed in order to producea real image that is smaller than the object?

A rock of weight 50 N falls a vertical distance of 7.0 m from rest.

What is the change in the gravitational potential energy store of the rock?

A glass contains an iced drink on a warm and humid day. Water starts to form on the
outside of the glass.

What is the name of the effect by which the water forms?

The diagram shows a wave.

Which row is correct?

The diagram represents particles of a gas inside a closed containerof constant volume.

The gas is heated.
What happens to the particles of the gas?

A rectangular coil is dropped betweena pair of opposite magnetic poles, as shown.

In which position is the magnitude of the induced e.m.f. in the coil the greatest?

Which type of object orbits the Sun?

Which statement about the mass and the weight of an object is correct?

Which statement is correct?

The speed-time graph fora train is shown.

Which regions of the graph show the train moving?

The diagrams show the forces acting on four moving objects.

Which object is moving at a constant speed?

The diagram shows a vertical wire carryinga current / placed between the poles ofa magnet.

What is the direction of the force on the wire exerted by the magnetic field?

The diagram shows a uniform beam which is balanced on a pivot at its centre. A force F is applied at a distance X to the left of the pivot. A second force 2F is applied to the right of the pivot to keep the beam in equilibrium.

What is the distance of the second force from the pivot?

The gravitational field strength on the Moon is 1.6 N/kg.

An astronaut has a mass of 75 kg

What is the weight of the astronaut on the Moon?

The count rate due to a sample ofa radioactive isotope is measured for 80 minutes.

What is the half-life of the isotope?

A model of an atom consists of small particles orbiting a central nucleus.

Where is the positive charge in an atom?

Which source of energy is renewable?

Which statement about the Milky Way is correct?

Which measuring devices are most suitable for determining the length of a swimming pool and the thickness of aluminium foil?

A student draws a diagram to show the directions of a light ray reflecting offa plane mirror.

What are the correct terms for the lines drawn?