0625_s25_qp_21

The speed–time graph for a racing car is divided into four sections, P, Q, R and S. The car starts the race but soon crashes into a wall of tyres. speed time P Q R S Which sections of the graph show that there is an acceleration that is changing?

The diagram shows the four forces acting on an aircraft in flight. 120 kN 60 kN 60 kN 40 kN Which arrow shows the direction of the resultant of the four forces?

The diagrams show two metal blocks, X and Y, suspended from identical force meters. X and Y have identical dimensions.

4 A girl has a gold necklace.

Which apparatus does she need to find the density of the gold?

balance measuring cylinder thermometer ruler

A

key B

= needed C

= not needed D

N

N Y X Which statement about X and Y is correct?

Which statement is not correct?

A force acting on a moving ball causes its motion to change. This force stays constant. What makes the force produce a greater change in the motion of the ball?

A farmer has two carts. The carts have the same weight, but one has four narrow wheels and the other has four wide wheels. narrow wheel wide wheel Which cart wheels sink less into soft ground and what is the reason? cart wheels reason

A hot gas and a cool liquid are at the same pressure. Which row describes the separation and the motion of the particles of a hot gas compared to those of a cool liquid? separation of gas particles motion of gas particles

A fixed mass of gas has a volume of 1.2 m3 and is at a pressure of 200 kPa. The gas expands at constant temperature to a volume of 1.8 m3. What is the new pressure of the gas?

The specific heat capacity of solid P is greater than that of solid Q. What does this statement mean?

When water evaporates, what escapes from the surface of the water?

A sealed container of gas is heated. The pressure of the gas increases. Which statement explains this increase in pressure?

A student has a copper rod and a wooden rod. Both rods have the same dimensions. The student puts one end of each rod into a beaker of crushed ice. After a few minutes, the student picks up the rods by the ends not in the ice. Which statement is correct?

The diagram shows a black object X at constant temperature. The arrows represent the absorption and emission of thermal radiation at the surface. Object Y is at the same constant temperature as X and is identical except that it has a white surface. Which row correctly compares object X with object Y? rate of absorption for X rate of emission for X

The diagram shows a cork with a weight attached so that the cork floats upright in water. X Y cork water surface weight Transverse waves travel across the water from X to Y. In which direction do the waves make the cork move?

A thin converging lens is used as a magnifying glass. How does the image compare with the object?

The diagram shows two plane mirrors at 90° to each other. A ray of light is incident on one of the mirrors. The ray reflects off both mirrors before reaching a screen. At which labelled point does the ray reach the screen? ray of light screen

The speed of light in a material is 50% of the speed of light in air. What is the refractive index of the material?

A beam of white light is split into a spectrum of seven colours. Which name is given to this process?

Satellites are sometimes used to receive and re-transmit television signals. Which row shows the type of satellite and the electromagnetic waves used? type of satellite electromagnetic waves used

A sound wave travels through the air and strikes a solid block of steel. Some of the sound is reflected from the steel, and some is transmitted through the steel. How does the speed and the wavelength of the sound in steel compare to the speed and the wavelength of the sound in air? speed in steel wavelength in steel

The diagram shows a bracelet containing two magnets. The arrows represent the pattern and the direction of the magnetic field due to the magnets. J K X Y Which row identifies the magnetic pole at J, the magnetic pole at K and where the magnetic field is the strongest? magnetic pole at J magnetic pole at K where the magnetic field is the strongest

Which row describes an electric field and its direction? description of electric field direction of electric field

Copper wire is available in fixed lengths but in various diameters d. Each wire has a different resistance R. Which relationship between R and d is correct?

The diagram shows three 20  resistors, R1, R2 and R3, and a switch S connected to a d.c. power supply. R1 R2 S R3 Switch S is open. The potential difference (p.d.) across R3 is 9.0 V. What is the p.d. across R3 when switch S is closed?

The circuits shown all include a d.c. power supply, one diode and two light-emitting diodes (LEDs). In which circuit will both LEDs be turned on?

A wire connected to a resistor R is moved in a magnetic field. A current is induced in the direction shown. In which direction is the wire moved? N S

Which component is not found in an a.c. generator?

There is a current in a straight metal wire in the direction shown. direction of current Which row describes the direction and the pattern of the magnetic field due to the wire when looking from vertically above the wire? direction pattern

A simple transformer contains an iron core. What is the function of the iron core in the transformer?

In an alpha particle scattering experiment, a beam of alpha particles is fired at a very thin piece of gold foil. In which direction do most of the alpha particles travel after hitting the foil? gold foil beam of alpha particles

An atom of boron contains 5 protons and 5 electrons. The nucleon number of the atom is 11. How many neutrons are there in the atom?

A detector placed near a radioactive isotope gives a measured count rate of 800 counts / minute. The half-life of the isotope is three hours. The background count rate is 32 counts / minute. What is the count rate on the detector after six hours?

Sodium-24 is a radioactive isotope that emits beta radiation. Which nuclear equation shows how sodium-24 decays? 24Na

Which safety precautions must be taken when using a source of gamma radiation? Reduce the distance between the source and the person. Reduce the time of exposure to the radiation. Use a suitable shielding material between the source and the person.

A student defines three periods of time: ● the time TS taken for the Earth to orbit the Sun ● the time TR taken for the Earth to rotate once on its axis ● the time TM taken for the Moon to orbit the Earth. Which row shows the shortest period of time and the longest period of time? shortest period of time longest period of time

Which statement about the Universe is correct?

Which statement about the cosmic microwave background radiation (CMBR) is correct?