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Physics Paper 1 Revision - Topic 1 Energy Stores and Systems
Energy transfers Specific heat capacity Name the types of energy Write the definition for specific heat capacity. Write the equation for specific heat capacity. Describe an experiment to find the specific heat capacity of an object. What are the energy transfers in a torch? How is the energy transferred in a fan oven – don’t forget waste energy? Where is work being done in an electrical circuit? Calculating energy transfers More calculations Write the equation for kinetic energy including units. Write the equation for potential energy including units. Calculate the Kinetic energy of a 200 Kg object travelling at 25 m/s. Calculate the potential energy transferred when a 600 Kg object is raised 16 m into the air. What happens to the potential energy when an object is falling. Calculate the final velocity of a 12Kg object falling 20 m. Write the equation for Work done on a spring. 20 J of energy was used to stretch a spring with a spring constant of 445 N/m, what is the final extension of the spring? Specific heat capacity calculations Substance Specific heat capacity (J/kgoC) Water 4200 Copper 390 Iron 450 concrete 3400 A 250g copper pipe is heated from 10oC to 31oC. What is the energy needed to heat the block. Calculate the final temperature when 1125J of energy is transferred to a 0.5 kg block of iron starting at 15oC
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Physics Paper 1 Revision - Topic 1 Energy Transfers and efficiency
Power Convection Explain how convection occurs. What states of matter can convection occur in? Explain how we use convection to heat a room use diagrams to help. Define what power is and give the equation with units. Calculate the power transferred when 600J of work is done in 1 minute Calculate the power when 200N is moved 50 m in 120s. Calculate the power transferred if a body builder lifts 50 kg 0.8m above his head in 7s. Conduction Conservation of energy Explain how conduction occurs. What states of matter can conduction occur in. Describe how we can reduce conduction in a house? Explain how these methods work. Efficiency What is the equation for efficiency? If 2000J is put into a blender and it is 70% efficient, how much energy is wasted? A radio uses 150 J or energy. 45 J was given off as sound energy. The rest was given off as heat energy. How much heat energy was produced (in J)? What was the efficiency of the radio? Draw a SANKEY diagram to show the efficiency of the radio. What is the conservation of energy principle? How is conservation of energy different for closed systems? E.g. a cold spoon dropped into a flask of hot soup and then sealed.
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Physics Paper 1 Revision - Topic 1 Energy Resources and uses
Wind Solar cells Waves and tides Geothermal Describe how wind is harnessed for energy, be sure to include advantages, disadvantages and energy transfers taking place. Describe how the sun’s energy is harnessed for energy, be sure to include advantages, disadvantages and energy transfers taking place. Describe how the sea is used to harness energy, be sure to include advantages, disadvantages and energy transfers taking place. Describe how the energy underground is harnessed for energy, be sure to include advantages, disadvantages and energy transfers taking place. Hydro-electricity Bio fuels Non-Renewables Environment Describe how water is used to harness energy, be sure to include advantages, disadvantages and energy transfers taking place. Describe how biofuels are made and how they are used to provide energy, be sure to include advantages, disadvantages and energy transfers taking place. State some examples of non-renewables and how they are used to harness energy, be sure to include advantages, disadvantages and energy transfers taking place. Evaluate the impact these energy resources have on the environment.
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Physics Paper 1 Revision - Topic 2 Current and Circuit Symbols
Define Current. What is current measured in? What needs to happen to allow current to flow? Define potential difference Define resistance. Cell Battery Switch open Switch closed Bulb Fuse LED Resistor Ammeter Voltmeter Diode LDR Thermistor Total charge Resistance Testing resistance What is the equation relating current time and charge? A charger passes a current of 6 A over a period of 12 s how much charge is transferred? A current of 3 A was passed into a battery over a period of 5 hours. How much charge was transferred? A charge of C was transferred passing with a current of 5 A. how long did the current flow for? What is the equation relating current voltage and resistance? A 6 resistor has a current passing through of 4 A what was the potential difference over the resistor? A resistor of 2 has a potential difference of 4 volts. How much current is being passed. A current of 4.5 A was passed over a resistor with a potential difference of 3 V. what is the resistance? Outline a plan to test how resistance changes with the length of a wire. Explain what you expect your results to show and why.
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Physics Paper 1 Revision - Topic 2 Current and Circuit Symbols
Ohmic conductors I-V Characteristics Outline a plan to test the I-V Characteristics of a component in a circuit. Include a diagram of the circuit you would set up. What is important about ohmic conductors and their resistance? What is important about an ohmic conductor and the potential difference? What happens when electrical charge flows through a filament lamp? Explain the relationship resistance has with temperature? How does a diode effect current? What is important about the resistance in a diode? Circuit diagram I-V Characteristic Graphs Ohmic conductor Filament Lamp Diode
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Physics Paper 1 Revision - Topic 2 circuit devices Resistance Graphs
Sensing circuits Circuit for a fan that can change speed with temperature Explain how a sensing circuit can be used to monitor temperature in a room to effect how a fan can change speed based on ambient (surrounding) temperature. Make sure you refer to current, potential difference and current in your explanation. Explain how a sensing circuit can be used to monitor brightness in a room to effect how a light can change brightness based on ambient (surrounding) light intensity. Make sure you refer to current, potential difference and current in your explanation. Circuit for a light that can change brightness with change in light Resistance Graphs LDR Explain how an LDR works LDR Thermistor Thermistor Explain how a thermistor works
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Physics Paper 1 Revision - Topic 2 Series and Parallel Circuits
Series circuits Parallel Circuits What will happen if there is s break in a series circuit? What is important about voltage in a series circuit? What is important about current in a series circuit? How can you work out the resistance of a total circuit if there is more than one component in it? What will happen if there is s break at 1 in the circuit ? What will happen if there is s break at 2 in the circuit ? What is important about voltage in a parallel circuit? What is important about current in a parallel circuit? How can you work out the resistance of a total circuit if there is more than one component in it? 1 2 Calculations in Series Circuits. Draw a circuit with 4 components in series Calculations in Parallel Circuits. For the circuit below: State the current at ammeter 2 Calculate the overall resistance of the circuit. Using the information given, calculate the voltage over each resistor and work out the voltage supplied by the battery. For the circuit below: The voltage given by the battery is 6 V. State the voltage for both voltmeters Calculate the Current for all ammeters (hint: start with 2 and 3 and don’t forget the rules!) Draw a circuit with bulbs in parallel Ammeter 2 A A I1 V I2 V A R1 = 2 3 = R2 V R1 = 2 3 = R2 V A A I = 6 A I3
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Physics Paper 1 Revision - Topic 2 Investigating resistance
Series circuits Parallel Circuits Outline a plan for how to investigate total resistance for resistors in a series circuit. Outline a plan for how to investigate total resistance for resistors in a parallel circuit Results Series Enter into the table what your results should show and why. Be sure to explain your results and sketch graphs in the next 2 boxes. Series Parallel Parallel
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Physics Paper 1 Revision - Topic 2 Electricity in the Home and Power
Mains Supply Power equations Draw a labelled diagram of wires in a plug State and describe the type of current supplied by the mains electricity? State and describe type of current supplied by batteries? State the mains voltage and frequency. Explain how you could get an electric shock by touching the live wire in a plug. Explain why you would get an electric shock by touching the live wire in a plug Write the equation relating energy, charge and potential difference. Write the equation relating power, current and voltage. Sub in the V=IR equation and write the equation relating power, current and resistance. Power Calcuations What is the equation that relates power, energy and time? What is meant by a power rating on electrical appliances? Why might it be bad to have a high power rating? 2000J of energy is transferred over 3 seconds, what is the power? 14000 W of power is used on a device over a period of 2 hours. How much energy is transferred? A 5 kW leaf blower is connected to the mains supply. Calculate the current flowing through the leaf blower. An filament lamp has a power of 80 W and a resistance of 12 . Calculate the voltage over the lamp. Hint: you may need to use more than one equation. A 900 W microwave is cooking some chicken, J of energy is needed to cook the chicken. How much time will it be in the microwave.
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Paper 1 Revision – Topic 2 –Electricity
Label each part of the National Grid Explain what happens to a wire if a high current is passed through it. How do we reduce energy loss in overhead cables. Describe the role of a Step – up Transformer. Where are step up transformers found? Describe the role of a Step – down Transformer. Where are step - down transformers found? KEY WORDS: Pylons Transformers Direct current Alternating current Frequency Socket Live/neutral/ earth wire Plugs Cables
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Paper 1 Revision – Topic 3 –The Particle Model
What is the equation for Density? Density = Put the equation into an equation triangle and state the units. Units for density = Units for mass = Units for Volume = Compare the density of a gas, compared to a solid. Draw the particle model for solids, liquids and gases: Solids Liquids Gases Complete the following table: State Shape Movement (energy) Bond strength Volume (fixed or not) Solid Liquid Gas Label these processes: 1: 2: 3: 4: 5: 6: KEY WORDS: Density Evaporation Mass Condensation Volume Sublimation Compressed Cooling Fixed Heating Random Bonds
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Paper 1 Revision – Topic 3 –The Particle Model Specific heat capacity
Explain why evaporation has a cooling effect. Give an example of when this is useful: What is ‘internal Energy’ How can we change the ‘Internal Energy’ of a substance? Describe what is meant my ‘Latent heat’ Name both types of ‘latent heat’ What is the equation for latent heat? Put the equation into an equation triangle: Define ‘Specific Heat Capacity’ Name 2 conductors: Name 2 insulators: If the specific heat capacity of water is 4200J/kgᵒC, calculate how much energy is needed to heat 1.5kg of water from 40°C to 60ᵒC. KEY WORDS: Specific heat capacity Conductors Particles Insulators Heating Energy Cooling Kinetic energy Latent heat Internal energy
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Paper 1 Revision – Topic 4 – Atomic Structure
Draw and label an atom, including the 3 components that an atom is made of. What is the charge of each of these particles? What is the definition of nuclear radiation? What causes background radiation? Explain how Rutherford and Marsden discovered the structure of the atom. Describe the structure of the 3 types of radiation: 𝛼 emissions: 𝛽 emissions: 𝛾 emissions: What is an isotope? Explain what half-life is: Technetium-99 has a half life of 6 hours. If the original count was 400, how much would be left after 1 day? Sketch the shape of a half life graph: What is meant by the term ‘ionising radiation’ KEY WORDS: Alpha radiation (𝛼) Beta radiation (𝛽) Gamma radiation (𝛾) Atomic number Isotope Mass number Half-life
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Paper 1 Revision – Topic 4 – Atomic Structure
Complete this decay equation to show Alpha decay: Complete this decay equation to show Beta decay: If nuclear radiation can cause harm to the body, justify why we still use it in medicine.. How could someone or something become ‘contaminated’ by radiation? How could they reduce the level of contamination? Properties of radiation: Penetrating power (what stops it?) Deflection by magnetic field Deflection by electric field Alpha radiation (𝛼) Beta radiation (𝛽) Gamma radiation (𝛾) Nuclear Radiation has many uses: Explain how a medical tracer works: Explain how x-rays work: Explain radiotherapy: Explain what Brachytherapy is: KEY WORDS: Alpha radiation (𝛼) Beta radiation (𝛽) Gamma radiation (𝛾) Atomic number Isotope Mass number Half-life
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Paper 1 Revision – Topic 4 – Atomic Structure
Explain nuclear fission (use diagrams): List the advantages and disadvantages of nuclear fission power stations. Advantages Disadvantages How does a nuclear power station generate electricity? Where does fusion happen naturally: How were the heavier chemical elements formed? Explain nuclear fusion (use diagrams): KEY WORDS: Nuclear fission Chain reaction Reactor Control rods Coolant Nuclear fusion Slow moving neutron
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