0625_m20_qp_32
A paper of Physics, 0625
Questions:
12
Year:
2020
Paper:
3
Variant:
2
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1
A student places 8 similar coins in a pile, as shown in . 2.4 cm pile of 8 coins (not to scale) The height of the pile of coins is 2.4 cm. Calculate the average thickness of one coin. average thickness = cm shows the pile of coins, a measuring cylinder and a beaker containing some water. pile of 8 coins water measuring cylinder (not to scale) Describe how the student can measure the volume of one of the coins using the set-up shown in .
1. Motion, forces and energy  →  1.4. Density
1. Motion, forces and energy  →  1.1. Physical quantities and measurement techniques
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3
A student drops a ball from a high window. The mass of the ball is 0.12 kg. Calculate the weight of the ball. weight = N shows the speed of the ball while it is falling. The points S, T, U, V and W are shown on the graph. 1.0 2.0 3.0 4.0 5.0 speed m / s time / s U V W S T Draw one line from each section of the graph to the correct description of the motion. One has been drawn for you. section of graph description of motion S – T T – U U – V at rest decreasing acceleration constant acceleration moving with constant speed slowing down Determine the distance fallen by the ball in section U – V of the graph. distance = m State the distance fallen by the ball in section V – W of the graph. distance = m
1. Motion, forces and energy  →  1.2. Motion
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6
Table 6.1 gives a list of statements about molecules in gases and solids. Table 6.1 statement gas solid molecules are closely packed molecules are free to move around from place to place molecules are far apart compared to their size molecules can only vibrate about a fixed position molecules change position randomly Put one tick in every row to indicate whether each statement refers to a gas or a solid. represents a smoke particle in air. The smoke particle is moving. smoke particle air shows the path of the smoke particle and the position of the smoke particle a short time later. smoke particle air State the term given to the movement of the smoke particle. State what the motion of the smoke particle shows about air molecules.
2. Thermal physics  →  2.1.2. Particle model
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7
Equal volumes of steel, oil and hydrogen are heated from 20 °C to 60 °C. Their volumes increase by thermal expansion. State which of these substances has the greatest increase in volume. shows a liquid-in-glass thermometer. –10 110 °C State the temperature reading on the thermometer. State the temperature range of the thermometer. State the values of the fixed points of the Celsius scale of temperature. The liquid-in-glass thermometer uses the thermal expansion of mercury. State and explain one other application or consequence of thermal expansion.
2. Thermal physics  →  2.2.1. Thermal expansion of solids, liquids and gases
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8
represents a travelling wave at an instant in time. distance from source of waves / cm displacement / cm direction of wave travel 1.0 –1.0 Determine the amplitude of the wave. amplitude = cm Determine the wavelength of the wave. wavelength = cm It takes 2.0 s for a source to emit the wave shown in . Calculate the frequency of the wave. frequency = Hz shows the main regions of the electromagnetic spectrum. radio waves microwaves visible light waves X-rays γ-rays Two of the regions are not labelled. Add the correct label to each of the unlabelled regions by writing in each box. Describe one use of γ-rays.
3. Waves  →  3.3. Electromagnetic spectrum
3. Waves  →  3.1. General properties of waves
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9
shows two rays of light X and Y leaving an object O. The rays strike a plane mirror. Ray X is reflected as shown. plane mirror ray of light X ray of light Y O On , draw the normal at the point where ray X strikes the mirror. On , draw the path of ray Y after it strikes the mirror. An object O is placed on the left of a thin converging lens. F is the principal focus. This arrangement is shown in . F O lens Two rays from the top of the object are incident on the lens, as shown in . On , draw the path of each ray to locate the position of the image of O formed by the lens. On , draw an arrow to represent the image and label it I.
3. Waves  →  3.2.3. Thin lenses
3. Waves  →  3.2.1. Reflection of light
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11
shows lamps in series. shows lamps in parallel. The lamps are all identical 6.0 V lamps. In each circuit there are three ammeters A1, A2 and A3. A1 A2 A3 6.0 V 6.0 V A1 A3 A2 Compare the readings on ammeters A1, A2 and A3 in . Compare the readings on ammeters A1, A2 and A3 in . State two advantages of connecting the 6.0 V lamps in parallel with the 6.0 V battery, compared with connecting the lamps in series with the battery. 1. 2. Each lamp has a resistance of 12 Ω. Determine the combined resistance of the two lamps connected in series. resistance = Ω Compare the resistance of one lamp with the combined resistance of the two lamps in parallel.
4. Electricity and magnetism  →  4.3.2. Series and parallel circuits
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12
A nucleus of americium-241 has the nuclide notation shown. 95Am Determine the number of neutrons in a nucleus of americium-241. number of neutrons = Determine the charge on a nucleus of americium-241. charge = Americium-241 decays by emitting α-particles. Put a tick in the box next to each correct statement. α-particles are electromagnetic waves. α-particles are fast-moving electrons. α-particles are helium nuclei. α-particles are stopped by a sheet of paper. α-particles can pass through 3 cm of aluminium. Americium-241 has a half-life of 432 years. A sample contains 16 mg of americium-241. Calculate the time it takes until only 4.0 mg of americium-241 are left in the sample. time = years
5. Nuclear physics  →  5.1.2. The nucleus
5. Nuclear physics  →  5.2.3. Radioactive decay
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