2019 Feb Mar P22

Which row shows the best choice of measuring instruments to obtain accurate values for the distances shown?

An object is moving with uniform deceleration. Which statement describes its motion?

The graph shows how the speed of a car varies during part of its journey.

What is the value of the car’s acceleration between 6 s and 10 s?

The gravitational field strength on the Moon is less than on the Earth. Which of these is different when done on the Moon compared with when done on the Earth?

The mass of a full bottle of cooking oil is 1.30 kg. When exactly half of the oil has been used, the mass of the bottle plus the remaining oil is 0.90 kg.

What is the mass of the empty bottle?

A solid ball has a volume of 4.0 cm³. The density of the ball is 1.6 g / cm³. What is the mass of the ball?

The extension/load graph for a spring is shown. The unstretched length of the spring is 15.0 cm.

When an object of unknown weight is suspended on the spring, the length of the spring is 16.4 cm. What is the weight of the object?

A box of mass 2.0 kg is pulled across the floor by a force of 6.0 N. The frictional force acting on the box is 1.0 N. What is the acceleration of the box?

Which moving body has a resultant force acting on it?

A constant force acts on a body causing the momentum of the body to increase. Which expression relates the force to the momentum and the time taken?

A car of mass 1500 kg has a speed of 20 m/s. It accelerates until its speed is 25 m/s. What is the increase in the kinetic energy of the car?

Which source of energy uses the production of steam to generate electrical energy?

A car, travelling on a straight horizontal road, has 1.6 MJ of kinetic energy. It accelerates for 20 s until it has 2.5 MJ of kinetic energy. What is the average power output used to increase the kinetic energy of the car?

Which diagram shows an athlete exerting least pressure on the ground?

The diagram shows a U-tube manometer containing three liquids: mercury, liquid X and liquid Y. Neither liquid X or liquid Y mixes with mercury.

Which row compares the pressure exerted by liquid X and by liquid Y on the mercury, and the density of liquid X and the density of liquid Y?

Gas molecules exert a pressure when they collide with the walls of a container. Which statement is correct?

A thermometer has graduations which start at –10 °C and end at 110 °C.

What is the lower fixed point and what is the upper fixed point of the Celsius scale?

A 1 kg block of aluminium requires more thermal energy to raise its temperature by 1 °C than a 1 kg block of copper requires. Why is this?

Four campers are warming their food on a fire. They use different rods, each of the same dimensions, to hold their food near the fire.

Which material is the best choice to prevent their hands from getting too hot?

Two metal cans are identical, except that one has a shiny silver outer surface and the other has a dull black outer surface. They each have 300 g of water at 80 °C sealed inside them. They are both in a vacuum, in the darkness of outer space. How does the temperature of the water in each one change?

The diagram shows a wave before it reflects from a barrier.

Which labelled section of the diagram represents a wavefront?

A vibrating object produces ripples on the surface of a liquid. The object completes 20 vibrations every second. The spacing of the ripples, from one crest to the next, is 3.0 cm. What is the speed of the ripples?

A narrow beam of light is travelling through a transparent liquid. It meets the surface as shown, at an angle of incidence of 40°. The refractive index of the liquid is 1.5.

What is the angle of refraction as the light enters the air?

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

What is the speed of X-rays in a vacuum and in air?

A sound wave passes a point. The air pressure at that point increases and then decreases 300 times every second. Which descriptions apply to this sound wave?

A boy stands 150 m from a wall. He claps and when he hears the echo, he immediately claps
again. He continues this for some time.
Another student has a stop-watch. She starts the watch on the first clap and stops it on the eleventh clap. The watch reads 10.0 s.
Which value do her measurements give for the speed of sound in air?

28 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.
End Q attracts end S.
End Q attracts end T.
End Q repels end U.

Which of the metal rods is a magnet?

A metal sphere is charged by induction. There are four stages W, X, Y and Z in this process.

W a charged rod is brought near to the sphere
X the sphere is earthed
Y the charged rod is taken away from the sphere
Z the earth connection is removed

In which order are the four stages carried out?

Which electrical quantity is defined in terms of the energy supplied in driving charge round a complete circuit?

A student sets up a circuit containing a battery of two cells and three lamps, as shown.

What is the circuit diagram for this arrangement

32 In which circuit does the lamp light?

Each potential divider is placed in a circuit with a power supply. Which potential divider makes the potential difference across component Y increase when the light intensity increases?

There are two inputs to the combination of logic gates shown, and one output.

Which truth table represents the action of this combination of gates?

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

Which statement about the direction of a magnetic field at a point is correct?

37 A current-carrying coil is placed in a magnetic field.

Which effect does the coil experience?

What are isotopes of an element?

A radioactive isotope of carbon ¹⁴C decays by beta emission to give an isotope of nitrogen ¹⁴N and a beta particle. The equation for the reaction is shown.

What is the value of X and of Y?

A beta particle is a fast moving electron. Which statement explains how beta particles are emitted from an atom?