0625_m24_qp_42
A paper of Physics, 0625
Questions:
11
Year:
2024
Paper:
4
Variant:
2
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1
. is a speed–time graph for the first 5 minutes of a bus journey. 2.5 5.0 7.5 10.0 1.0 2.0 3.0 4.0 t / min 5.0 speed m / s Describe the motion between: 1. t = 0.90 min and t = 2.9 min 2. t = 2.9 min and t = 3.5 min 3. t = 3.5 min and t = 4.5 min Another bus travels at a speed of 8.9 m / s. The brakes apply a constant force and the bus stops in a distance of 23 m. This bus has a mass of 18 000 kg. Calculate the kinetic energy of the bus before the brakes are applied. kinetic energy = Calculate the force applied to stop the bus. force =
1. Motion, forces and energy  →  1.2. Motion
1. Motion, forces and energy  →  1.7.1. Energy
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3
A car has a weight of 13 000 N. The car is supported by 4 tyres. The area of each tyre in contact with the road is 0.016 m2. Calculate the pressure on the road due to the weight of the car. pressure = Explain, in terms of particles, why the air pressure in the tyres increases when the car travels along the road. A gas cylinder contains helium gas at a pressure of 2.0 × 106 Pa. A volume of 0.026 m3 of the compressed gas is released from the cylinder into balloons. Each balloon contains 0.015 m3 of helium at atmospheric pressure (1.0 × 105 Pa). The temperature remains constant. Calculate the maximum number of balloons that can be filled. maximum number of balloons =
2. Thermal physics  →  2.1.3. Gases and the absolute scale of temperature
2. Thermal physics  →  2.1.2. Particle model
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4
Define specific heat capacity. A volume of 0.0024 m3 of oil is heated in a pan for 7.0 min. The temperature of the oil increases from 20 °C to 180 °C. The density of the oil is 910 kg / m3. The specific heat capacity of the oil is 2000 J / (kg °C). Calculate the mass of oil in the pan. mass = Calculate the energy required to increase the temperature of the oil. energy = Calculate the power required to supply the energy calculated in . power =
2. Thermal physics  →  2.2.2. Specific heat capacity
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5
Table 5.1 shows applications of regions of the electromagnetic spectrum. Complete the second column of the table with the region of the electromagnetic spectrum used for each application. Choose from the regions in this list: gamma rays infrared microwaves radio waves ultraviolet Each region may be used once, more than once or not at all. Table 5.1 application region of electromagnetic spectrum cancer treatment gamma rays Bluetooth data connection optical fibres security marking sterilising food wireless internet State the approximate speed of radio waves in air. speed = m / s shows successive crests of a wave after a plane wave has passed through a gap. On draw three successive crests before the wave reaches the gap. shows a much wider gap. A plane wave of the same wavelength as in is incident on the gap from the left side of the barrier. On , draw three successive crests of the wave after the wave has passed through the gap.
3. Waves  →  3.3. Electromagnetic spectrum
3. Waves  →  3.1. General properties of waves
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6
shows a full‑scale diagram of an object O and its image I produced by a converging lens. The lens and its position on the principal axis are not shown. O I principal axis On , draw: • a single ray to locate the position of the centre of the converging lens • a line to represent the position of the lens and label the line L. Determine the focal length of the lens by drawing another ray on . focal length = The object is moved 2.0 cm closer to the lens. State two changes to the characteristics of the image.
3. Waves  →  3.2.3. Thin lenses
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8
shows a wire carrying a large current. large current square card shows the square card viewed from above. card On , draw three magnetic field lines that indicate the direction of the magnetic field and how its strength varies with distance from the wire. The current in the wire increases and the direction of the current is reversed. State how these changes affect the magnetic field. Electricity is transmitted at high voltage. Explain why a high voltage increases the efficiency of transmission even with thinner wires.
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
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9
An experiment directs alpha particles at a very thin sheet of gold foil. Most of the alpha particles pass through the thin foil in a straight line. State the conclusion about atoms from this observation. Some of the alpha particles are deflected through angles less than 90° and a few are deflected through 180°. State and explain two conclusions about the nuclei of atoms from this observation. conclusion 1 explanation 1 conclusion 2 explanation 2 A source contains a radioactive isotope of strontium. This isotope decays by emission of β‑particles. The half‑life of this isotope is 29 years. State the change in the nucleus which occurs when a β‑particle is emitted. The initial mass of this isotope of strontium in the source is 25 µg. Calculate the mass of the strontium isotope that decays in 87 years. mass = µg
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.1.1. The atom
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10
represents different positions A–H of the Moon as it rotates around the Earth. light from the Sun Earth A E D B H F C G State a position of the Moon where an observer on Earth sees: 1. there is a quarter Moon 2. there is a full Moon State the approximate time taken for the Moon to orbit the Earth. time = The average distance of the Earth from the Sun is 1.5 × 108 km. Calculate the average orbital speed of the Earth in km / h. average orbital speed = km / h The speed of light in a vacuum is 3.0 × 108 m / s. Calculate the time taken for light from the Sun to reach the Earth. time =
6. Space physics  →  6.1.1. The Earth
6. Space physics  →  6.1.2. The Solar System
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