0625_w18_qp_31
A paper of Physics, 0625
Questions:
12
Year:
2018
Paper:
3
Variant:
1
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2
shows a raft floating on water. raft water A force of 20 000 N acts on the raft in the direction of the arrow shown in . State the name given to the force shown in . Calculate the mass of the raft. mass = kg A sail is added to the raft, as shown in . 800 N 1200 N sail shows the horizontal forces acting on the raft at one moment. Calculate the resultant horizontal force acting on the raft and state the direction of this force. force = N direction =
1. Motion, forces and energy  →  1.5.1. Effects of forces
4. Electricity and magnetism  →  4.5.4. Force on a current-carrying conductor
1. Motion, forces and energy  →  1.5.2. Turning effect of forces
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4
A student draws diagrams that represent three states of matter, as shown in . Box B shows the arrangement of particles in a liquid. box A box B box C In box A, draw the arrangement of particles in a solid. In box C, draw the arrangement of particles in a gas. Write the correct term for each change of state below each arrow in . solid liquid gas liquid A wet beaker is in a warm room. After several hours the beaker is dry. State and explain what happens to the water. Use your ideas about molecules in your answer.
2. Thermal physics  →  2.1.1. States of matter
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
2. Thermal physics  →  2.1.2. Particle model
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5
A tidal barrage produces electricity using tides. shows a diagram of a tidal barrage . tide coming in river turbine high tide flow of water flow of water ocean ocean low tide tide going out river barrage barrage turbine The water behind the barrage is a store of energy. State the name of this stored energy. Explain how the tidal barrage produces electricity.
1. Motion, forces and energy  →  1.7.3. Energy resources
4. Electricity and magnetism  →  4.2.5. Electrical energy and electrical power
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6
Some materials are poor conductors of thermal energy (heat energy). State the term that describes materials that are poor conductors of thermal energy. Some materials are good conductors of thermal energy. Draw a ring around each material that is a good conductor of thermal energy. air aluminium copper glass plastic water A student has two rods made of different materials. The rods are the same size. Describe an experiment to identify which material is the better conductor of thermal energy. You may draw a diagram in the space below.
2. Thermal physics  →  2.3.1. Conduction
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7
shows the electromagnetic spectrum. One type of radiation is not labelled. radio waves micro- waves infra-red waves visible light X-rays gamma rays On , add the label for the missing type of radiation. The arrow in indicates a property that is increasing. State the name of the property that is increasing in the direction of the arrow. Compare the speeds of radio waves and visible light in a vacuum. Describe how X-rays are used for security in airports. Explain the properties of X-rays that make them useful in airport security.
3. Waves  →  3.3. Electromagnetic spectrum
2. Thermal physics  →  2.3.3. Radiation
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8
shows a tuning fork and a wooden block. tuning fork wooden block The tuning fork is hit against the wooden block and then makes a sound. Describe how the tuning fork produces the sound. The tuning fork produces a sound with a frequency of 659 Hz. State whether a healthy human ear can hear this frequency of sound. Explain your answer. represents the sound wave produced by a tuning fork. time A second tuning fork produces a different sound. Compared with the sound represented in , this sound is quieter and has half the frequency. On , draw the wave to show the sound produced by the second tuning fork.
3. Waves  →  3.4. Sound
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9
A student experiments with electric charge. The student uses a dry cloth to rub a plastic rod. The rod becomes positively charged. Explain how the friction between the rod and the cloth causes the rod to become positively charged. Use your ideas about the movement of charge. The student suspends a balloon from an insulating thread, as shown in . balloon insulating thread The balloon has an electric charge. Explain how the student can use a positively charged rod to determine the charge on the balloon.
4. Electricity and magnetism  →  4.2.1. Electric charge
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10
A student does an experiment to determine the resistance of a fixed resistor, R. The student draws an incomplete diagram of the circuit, as shown in . open switch variable resistor R On , draw the missing circuit symbols. Describe how the student could use the circuit to determine a reliable value for the resistance of R. shows a 20 Ω resistor connected to a power supply. 20 Ω 0.4 A A second 20 Ω resistor is connected in series with the first. State and explain how this affects the current in the circuit.
4. Electricity and magnetism  →  4.2.4. Resistance
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11
A student has a model electric railway. The model railway uses a step-down transformer. The input voltage is 230 V. The transformer has 1710 turns on the input coil and 90 turns on the output coil. Calculate the output voltage of the transformer. output voltage = V A step-up transformer is used to increase voltage. Step-up transformers and step-down transformers have different coil arrangements. Describe the differences in the coil arrangement for the two types of transformer. Explain the advantage of transmitting electricity at high voltages, rather than at low voltages.
4. Electricity and magnetism  →  4.5.6. The transformer
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12
This notation represents the nucleus of a neutral atom of carbon-14. 6C State the number of: 1. protons in the nucleus of an atom of carbon-14 2. electrons orbiting the nucleus of an atom of carbon-14 3. neutrons in the nucleus of an atom of carbon-14. Carbon-14 is an isotope of carbon. Carbon-12 is another isotope of carbon. Compare the nucleus of carbon-14 with the nucleus of carbon-12. State the similarities and differences. Scientists use carbon-14 to estimate the age of wood that is very old. A very old sample of wood contains 1.0 × 108 carbon-14 atoms. When the sample was new, it contained 8.0 × 108 carbon-14 atoms. The half-life of carbon-14 is 5 700 years. Estimate the age of the sample of wood. age of wood = years
5. Nuclear physics  →  5.2.4. Half-life
5. Nuclear physics  →  5.1.1. The atom
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