0625_s17_qp_32
A paper of Physics, 0625
Questions:
12
Year:
2017
Paper:
3
Variant:
2
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1
shows students about to start a 50.0 m swimming race. The length of the pool is 50.0 m. Name a suitable piece of equipment that could be used to measure the length of the pool. The race starts and the students swim to the end of the 50.0 m pool. shows the times recorded on the stop watches for the winner and the swimmer in second place. 0. 58 75 min s s winner 1. 05 87 min s s second place Determine the time taken by the winner to swim 50.0 m. Use information from . winner’s time = s Calculate the average speed of the winner. average speed = m/s Calculate the time difference between the winner and the swimmer in second place. time difference = s
1. Motion, forces and energy  →  1.2. Motion
3. Waves  →  3.4. Sound
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3
shows a large sunshade. base support pivot arm sunshade The arm holding the sunshade pivots about the end of a support. The sunshade has a mass of 20.0 kg. Calculate the weight of the sunshade. weight = N Another sunshade is shown in . This sunshade weighs 180 N. The arm holding the sunshade extends 2.5 m from the pivot. base support 180 N pivot 2.5 m Calculate the moment of the sunshade about the pivot. moment = N m How can the moment produced by the sunshade be reduced? Tick one box. by decreasing the height of the support by decreasing the length of the arm holding the sunshade by increasing the weight of the base by increasing the weight of the sunshade
1. Motion, forces and energy  →  1.5.2. Turning effect of forces
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4
A house has white wooden walls and a black wooden door, as shown in . white black The Sun is shining on the door and the front wall of the house. State the name of the process by which thermal energy is transferred from the Sun to the Earth. shows part of the white wall and the black door of the house. Two thermometers have been attached, one to the wall and the other to the door. thermometer A thermometer B Thermometer A measures the temperature of the white wall. Thermometer B measures the temperature of the black door. The thermometer readings are recorded after the Sun has been shining on the house for some time. Suggest which thermometer has the higher temperature and explain why. higher temperature explanation The air conditioning unit inside a room in the house is switched on. The air conditioning unit takes in warm air and gives out cold air, as shown in . door cold air air conditioning unit ceiling room Explain how the air conditioning unit cools all the air in the room.
2. Thermal physics  →  2.3.4. Consequences of thermal energy transfer
2. Thermal physics  →  2.3.3. Radiation
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5
A potato snack packet is taken onto an aeroplane. During the flight the pressure inside the aeroplane changes and the potato snack packet changes shape, as shown in . P O TA A N S C K T O P O T AT O SN AC K P O T AT O SN AC K P O TA A N S C K T O potato snack packet before flight potato snack packet during flight Explain why the packet changes shape. Use ideas about the gas molecules inside and outside the packet in your answer. A deep-sea diver on a diving-boat experiences atmospheric pressure. When she is working underwater, she experiences an increased pressure. State two factors that affect the size of the increased pressure. 1. 2. shows a device used for measuring atmospheric pressure. mercury State the name of the device shown in . shows a manometer connected to a gas supply. The pressure of the gas supply is greater than atmospheric pressure. Atmospheric pressure is equal to 1033.6 cm of water. cm water gas supply Determine the pressure of the gas supply. pressure = cm of water
1. Motion, forces and energy  →  1.8. Pressure
2. Thermal physics  →  2.1.3. Gases and the absolute scale of temperature
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6
shows an overhead view of two cars approaching a road junction. A plane mirror helps the drivers to see other cars. driver 2 tall building driver 1 ray of light from car 1 plane mirror car 1 car 2 road A ray of light from car 1 is shown. On , clearly draw the normal to the plane mirror where this ray hits the plane mirror. Label the normal N. On , carefully draw the reflected ray of light. State the law used in your answer to . Can each driver see the other car? Explain your answer. shows a ray of light incident on a glass block. ray of light glass block On , continue the path of the ray into the block. On , clearly label the angle of incidence i and the angle of refraction r.
3. Waves  →  3.2.1. Reflection of light
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7
shows the regions of the electromagnetic spectrum. radio waves microwaves infra-red waves ultraviolet waves X-rays Give the names of the two regions that are labelled 1 and 2. 1. 2. Use words from the box to complete the sentence. acceleration amplitude frequency speed wavelength Compared with other regions in the electromagnetic spectrum, radio waves have the largest and the smallest . Sound is not an electromagnetic wave. Give one other way in which sound waves are different from radio waves. Two students, X and Y, carry out an experiment to determine the speed of sound in air. X has two blocks of wood that make a loud, sharp sound when banged together. Y has a tape measure and a stopwatch. Describe how X and Y can use the equipment to measure the speed of sound in air.
3. Waves  →  3.4. Sound
3. Waves  →  3.3. Electromagnetic spectrum
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9
shows a current-carrying coil in a magnetic field. battery C coil connections to battery D B A F + – N S current The direction of the current in side AB of the coil is labelled. The force F on side AB is also labelled. On , draw • an arrow labelled X, on side CD, to show the direction of the current in this side of the coil, • an arrow labelled P, to show the direction of the force on CD. Give two ways of increasing the forces F and P on the sides of the coil. 1. 2. Name the particles that flow in the metal wire of the coil. The wire of the coil is replaced by a thinner wire. This wire is the same length and is made of the same metal. State and explain how this changes the current in the coil.
4. Electricity and magnetism  →  4.5.4. Force on a current-carrying conductor
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
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10
A student wants to investigate how the resistance of a light-dependent resistor (LDR) varies with the brightness of the light in the room. To investigate this, the student connects the circuit shown in . V V The student has made three errors. Identify the three errors in the student’s circuit. 1. 2. 3. The student corrects the errors. His results are shown in . % of full brightness resistance of LDR / Ω 10 000 12 000 14 000 16 000 18 000 Use the information in to describe how the brightness of the light in the room affects the resistance of the LDR. The potential difference across the LDR is 8.0 V. Calculate the current in the LDR when the light is 60% of full brightness. current = A
4. Electricity and magnetism  →  4.2.4. Resistance
4. Electricity and magnetism  →  4.3.2. Series and parallel circuits
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