0625_w23_qp_33
A paper of Physics, 0625
Questions:
11
Year:
2023
Paper:
3
Variant:
3
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1
shows the speed–time graph for a bus journey. time / s speed m / s Using the information in , determine: the maximum speed of the bus during the journey maximum speed = m / s the speed of the bus at time = 65 s. On , show how you obtained this information. speed = m / s Describe how the speed of the bus changes between time = 60 s and time = 80 s. Determine the distance travelled by the bus between time = 0 and time = 10 s. distance travelled = m shows the speed–time graph for another bus journey. time / s speed m / s The driver sees a hazard ahead and applies the brakes at time = 40 s. The bus reduces its speed from 14.0 m / s to 6.0 m / s in a time of 5.0 s. On , draw the speed–time graph for the bus as it reduces its speed.
1. Motion, forces and energy  →  1.2. Motion
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2
A farmer uses a rope to lift a barrel of fruit from the ground to a platform, as shown in . barrel of fruit platform farmer ground rope 3.2 m The farmer lifts the barrel of fruit at a constant speed. State the energy store of the barrel of fruit that increases as the barrel rises. The weight of the barrel of fruit is 140 N. Show that the work done on the barrel of fruit in lifting it from the ground to the platform is approximately 450 J. The farmer wants to make the process faster. He buys a machine to lift the barrels of fruit. The output power of the machine is 75 W. The work done in lifting a barrel of fruit onto the platform is 450 J. Calculate the time taken for the machine to lift a barrel of fruit onto the platform. time = s The machine uses an electric motor. The farmer installs some wind turbines to supply electrical power for the farm. Suggest one environmental reason for using wind turbines rather than using a diesel (fossil fuel) generator.
1. Motion, forces and energy  →  1.7.3. Energy resources
1. Motion, forces and energy  →  1.7.4. Power
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3
The mass of a glass bottle is 0.18 kg. Calculate the weight of the bottle. weight = N The bottle contains 2.7 kg of cooking oil. The density of the cooking oil is 0.92 g / cm3. Calculate the volume of the cooking oil. volume = cm3 A cookery student pours some cooking oil into a glass bowl containing water, as shown in . glass bowl cooking oil water The student accidently drops a plastic spoon and a metal spoon into the bowl. The densities of the spoons and liquids are shown in Table 3.1. Table 3.1 material density g / cm3 plastic spoon 0.76 metal spoon 8.7 cooking oil 0.92 water 1.0 On , label a suggested position for each spoon after each has fallen into the bowl. Use the letter P to label the position of the plastic spoon and the letter M to label the position of the metal spoon.
1. Motion, forces and energy  →  1.4. Density
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4
shows a pan on a hotplate. The hotplate heats the pan and the water. wooden handle hotplate copper base water shiny sides Use your ideas about thermal energy transfer to explain why the pan has: a wooden handle shiny sides a copper base. shows a heater for warming a room. When there is hot water in the heater, thermal energy transfers from the water to the room. heater Explain how thermal energy from the heater warms the entire room. Use your ideas about the density of air. You may draw on .
2. Thermal physics  →  2.3.4. Consequences of thermal energy transfer
2. Thermal physics  →  2.3.3. Radiation
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5
shows regions of the electromagnetic spectrum in order of increasing wavelength. Two of the regions are unlabelled. gamma rays X-rays visible light increasing wavelength infrared radio waves Complete by writing the name of each unlabelled region in the correct box. State two properties that are the same for all regions of the electromagnetic spectrum. State one use for infrared radiation. State one harmful effect of excessive exposure to infrared radiation.
3. Waves  →  3.3. Electromagnetic spectrum
2. Thermal physics  →  2.3.3. Radiation
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6
A student shines a ray of red light into a rectangular glass block, as shown in . glass block ray ray ray of red light ray air Draw the normal at the point where the ray of red light enters the glass block. On , label each ray using words from the list. diffracted diffused dispersed incident reflected refracted and each show two parallel rays of light travelling through air towards a lens. For each lens, draw the path of the two rays as they pass through the lens and back into the air. State the seven colours of visible light. Give the colours in order of frequency. frequency colour greatest smallest
3. Waves  →  3.2.4. Dispersion of light
3. Waves  →  3.2.2. Refraction of light
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7
Two identical resistors, R1 and R2, are connected to a 24 V battery, as shown in . 24 V R1 R2 The value of each resistor is 50 Ω. Calculate the combined resistance of R1 and R2 when they are connected as shown in . combined resistance = Ω Show that the current in the circuit is approximately 0.25 A. Determine the potential difference (p.d.) across R1. p.d. = V Calculate the power transferred in R1. power = W A student connects R1, R2 and the battery to make a different circuit. The resistors R1 and R2 are connected so their combined resistance is as small as possible. Draw a circuit diagram to show how R1 and R2 are connected to the battery.
4. Electricity and magnetism  →  4.3.2. Series and parallel circuits
4. Electricity and magnetism  →  4.3.3. Action and use of circuit components
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8
shows an arrangement for transmitting electricity generated by a power station. power station generating electricity at 25 kV a.c. power cables 360 kV a.c. step-up transformer step-down transformer homes (not to scale) The step-up transformer has 500 turns on the primary coil. Calculate the number of turns on the secondary coil of the step-up transformer. Use the information given in . number of secondary turns = State two benefits of using high voltages for transmitting electricity.
4. Electricity and magnetism  →  4.5.6. The transformer
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9
Describe what is meant by alternating current (a.c.). A teacher demonstrates how a loudspeaker works by using the equipment shown in . N coil paper cone strong magnet direction of vibration of paper cone S There is an alternating current in the coil. The paper cone and coil vibrate as shown in . Explain why the paper cone vibrates. Use your ideas about magnetism. When the paper cone vibrates, the teacher hears a sound. Suggest a value for the frequency of the alternating current. Include the unit. frequency = unit
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
4. Electricity and magnetism  →  4.2.2. Electric current
4. Electricity and magnetism  →  4.5.2. The a.c. generator
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10
represents all the particles in a lithium atom. proton neutron electron Key (not to scale) State the proton number (atomic number) of the lithium atom in . Determine the nucleon number (mass number) of the lithium atom in . nucleon number = Describe how a lithium atom changes to form a positive ion. The half-life of iodine-131 is 8 days. A sample contains 80 mg of iodine-131. Calculate the time taken to decay until 10 mg of iodine-131 remain in the sample. time taken = days
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.1.2. The nucleus
5. Nuclear physics  →  5.2.4. Half-life
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11
represents the Earth in orbit around the Sun. 1.5 × 1011 m the Sun the Earth (not to scale) State the name of the force that keeps the Earth in orbit around the Sun. State the time taken by the Earth to complete one orbit of the Sun. Include the unit. time for one orbit = State the time taken by the Earth to rotate once on its axis. Include the unit. time for one rotation = The Sun consists mainly of two gases. State the names of the two gases. and Question continued on next side Most of the radiation from the Sun consists of visible light and two other regions of the electromagnetic spectrum. State the name of one of the other two regions. The speed of visible light is 3.0 × 108 m / s. Calculate the time taken for visible light to travel from the Sun to the Earth when the Earth is in the position shown in . time taken = s
6. Space physics  →  6.1.2. The Solar System
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