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    A good unofficial markscheme
    (Original post by ihatehannah)
    Completed mark scheme, hope it's clear and a good indication of what you got in the exam, good luck!
    1. Frequency ( 1)

    2. Echoes (1)

    3. spread out, same as (2)

    b) vibrations are parallel to the direction of energy transfer (2)

    4. Expensive as National Grid is a long distance away from rural areas (1)

    4b) ADVANTAGES
    constant supply, little variation in output
    £30k cheaper than wind turbine
    renewable resource
    doesn't produce as much noise as wind
    No CO2

    DISADVANTAGES
    could ruin ecosystem by preventing free movement of fish
    May need maintenance unlike wind
    Lower power output - 8W compared to 10W

    Wind - ADVANTAGES
    higher average output
    Needs little maintenance
    renewable resource
    Easily expanded
    No CO2

    DISADVANTAGES
    Eyesore
    noise pollution
    Wind speeds vary, meaning there could be times of under- or oversupply
    Costs 50k, 30k more than HEP (6)

    5. inefficient as less or little energy used to heat food as heat is lost as infrared radiation to the surroundings(2)

    uses of infrared(1) : remote controls, optical fibres

    uses of microwaves(1): mobile phones, satellites

    b) properties of microwaves and infra red radiation (2): can diffract, can refract, travel same speed in vaccuum, both transverse waves, can be reflected transverse• same speed (through air)• can be reflected• can be refracted• can be diffracted• can be absorbed• transfer energy• can travel through a vacuum• can be polarised• show interference

    calculation questions, 340 m/s for first one (2) then 78 degrees(3) , then 6.4 watts(2) then 0.07 degrees/s (2) efficiency question was 0.48 W (2)


    6. Fins increase surface area and black matt a are good absorbers of heat (2)

    7. cosmic microwave background radiation (1)

    b) provides evidence for the big bang theory (1)


    10. They keep costs as low as possible as efficiency does not increase as much but the cost goes up rapidly , ( give example and data figures to secure the marks) (2)


    11. why france will still use nuclear power(2) : cost of electricity is cheaper(1) and produces much more electricity(1) , produces no greenhouse gases like co2(1)

    12. Disadvantages of nuclear power stations(2): raw materials are non- renewable, high decommissioning costs, produces radioactive waste.

    13. factors that affect rate of energy transfer of mug(2): room temperature, surface area , how shiny it is( not sure about this one) and colour of the mug

    b) particles gain kinetic energy and collide more frequently, passing on their extra kinetic energy to other particles .(2)


    c) how is a convection current formed in the mug(4): liquid at the bottom is heated and particles gain kinetic energy and move away from each other, this makes the liquid less dense , causing it to rise and displace the denser colder liquid at the top , the denser particles then fall and is heated again.


    14) control variable for the investigation measuring rate of evaporation (1) : same beaker or same type of beaker, same position in the room., same thermometer .

    b) why is the data logger better(2): more accurate (1) , easier to read(1) , more precise (1) avoids human error (1)

    15 relationship of the graph comparing 3 types of beakers and their rate of evaporation(1): as time increases, rate of evaporation decreases.

    b) Beaker A(1) gradient of the line is the lowest and the final temperature is the highest of em all

    c) If investigation was repeated with lower volume , what effect would it have(1) : rate of evaporation will be higher (1)

    Why evaporation causes temperature to decrease (3): particles with enough kinetic energy and travelling in the right direction will escape the liquid and evaporate and take their kinetic energy with them , which means average kinetic energy of particles in liquid is lower and thus temperature is lower.

    16) why a vacuum reduces energy transfer (2) : no particles so stops energy transfer by conduction , convection.
    (Original post by ihatehannah)
    Completed mark scheme, hope it's clear and a good indication of what you got in the exam, good luck!
    1. Frequency ( 1)

    2. Echoes (1)

    3. spread out, same as (2)

    b) vibrations are parallel to the direction of energy transfer (2)

    4. Expensive as National Grid is a long distance away from rural areas (1)

    4b) ADVANTAGES
    constant supply, little variation in output
    £30k cheaper than wind turbine
    renewable resource
    doesn't produce as much noise as wind
    No CO2

    DISADVANTAGES
    could ruin ecosystem by preventing free movement of fish
    May need maintenance unlike wind
    Lower power output - 8W compared to 10W

    Wind - ADVANTAGES
    higher average output
    Needs little maintenance
    renewable resource
    Easily expanded
    No CO2

    DISADVANTAGES
    Eyesore
    noise pollution
    Wind speeds vary, meaning there could be times of under- or oversupply
    Costs 50k, 30k more than HEP (6)

    5. inefficient as less or little energy used to heat food as heat is lost as infrared radiation to the surroundings(2)

    uses of infrared(1) : remote controls, optical fibres

    uses of microwaves(1): mobile phones, satellites

    b) properties of microwaves and infra red radiation (2): can diffract, can refract, travel same speed in vaccuum, both transverse waves, can be reflected transverse• same speed (through air)• can be reflected• can be refracted• can be diffracted• can be absorbed• transfer energy• can travel through a vacuum• can be polarised• show interference

    calculation questions, 340 m/s for first one (2) then 78 degrees(3) , then 6.4 watts(2) then 0.07 degrees/s (2) efficiency question was 0.48 W (2)


    6. Fins increase surface area and black matt a are good absorbers of heat (2)

    7. cosmic microwave background radiation (1)

    b) provides evidence for the big bang theory (1)


    10. They keep costs as low as possible as efficiency does not increase as much but the cost goes up rapidly , ( give example and data figures to secure the marks) (2)


    11. why france will still use nuclear power(2) : cost of electricity is cheaper(1) and produces much more electricity(1) , produces no greenhouse gases like co2(1)

    12. Disadvantages of nuclear power stations(2): raw materials are non- renewable, high decommissioning costs, produces radioactive waste.

    13. factors that affect rate of energy transfer of mug(2): room temperature, surface area , how shiny it is( not sure about this one) and colour of the mug

    b) particles gain kinetic energy and collide more frequently, passing on their extra kinetic energy to other particles .(2)


    c) how is a convection current formed in the mug(4): liquid at the bottom is heated and particles gain kinetic energy and move away from each other, this makes the liquid less dense , causing it to rise and displace the denser colder liquid at the top , the denser particles then fall and is heated again.


    14) control variable for the investigation measuring rate of evaporation (1) : same beaker or same type of beaker, same position in the room., same thermometer .

    b) why is the data logger better(2): more accurate (1) , easier to read(1) , more precise (1) avoids human error (1)

    15 relationship of the graph comparing 3 types of beakers and their rate of evaporation(1): as time increases, rate of evaporation decreases.

    b) Beaker A(1) gradient of the line is the lowest and the final temperature is the highest of em all

    c) If investigation was repeated with lower volume , what effect would it have(1) : rate of evaporation will be higher (1)

    Why evaporation causes temperature to decrease (3): particles with enough kinetic energy and travelling in the right direction will escape the liquid and evaporate and take their kinetic energy with them , which means average kinetic energy of particles in liquid is lower and thus temperature is lower.

    16) why a vacuum reduces energy transfer (2) : no particles so stops energy transfer by conduction , convection.
    (Original post by ihatehannah)
    Completed mark scheme, hope it's clear and a good indication of what you got in the exam, good luck!
    1. Frequency ( 1)

    2. Echoes (1)

    3. spread out, same as (2)

    b) vibrations are parallel to the direction of energy transfer (2)

    4. Expensive as National Grid is a long distance away from rural areas (1)

    4b) ADVANTAGES
    constant supply, little variation in output
    £30k cheaper than wind turbine
    renewable resource
    doesn't produce as much noise as wind
    No CO2

    DISADVANTAGES
    could ruin ecosystem by preventing free movement of fish
    May need maintenance unlike wind
    Lower power output - 8W compared to 10W

    Wind - ADVANTAGES
    higher average output
    Needs little maintenance
    renewable resource
    Easily expanded
    No CO2

    DISADVANTAGES
    Eyesore
    noise pollution
    Wind speeds vary, meaning there could be times of under- or oversupply
    Costs 50k, 30k more than HEP (6)

    5. inefficient as less or little energy used to heat food as heat is lost as infrared radiation to the surroundings(2)

    uses of infrared(1) : remote controls, optical fibres

    uses of microwaves(1): mobile phones, satellites

    b) properties of microwaves and infra red radiation (2): can diffract, can refract, travel same speed in vaccuum, both transverse waves, can be reflected transverse• same speed (through air)• can be reflected• can be refracted• can be diffracted• can be absorbed• transfer energy• can travel through a vacuum• can be polarised• show interference

    calculation questions, 340 m/s for first one (2) then 78 degrees(3) , then 6.4 watts(2) then 0.07 degrees/s (2) efficiency question was 0.48 W (2)


    6. Fins increase surface area and black matt a are good absorbers of heat (2)

    7. cosmic microwave background radiation (1)

    b) provides evidence for the big bang theory (1)


    10. They keep costs as low as possible as efficiency does not increase as much but the cost goes up rapidly , ( give example and data figures to secure the marks) (2)


    11. why france will still use nuclear power(2) : cost of electricity is cheaper(1) and produces much more electricity(1) , produces no greenhouse gases like co2(1)

    12. Disadvantages of nuclear power stations(2): raw materials are non- renewable, high decommissioning costs, produces radioactive waste.

    13. factors that affect rate of energy transfer of mug(2): room temperature, surface area , how shiny it is( not sure about this one) and colour of the mug

    b) particles gain kinetic energy and collide more frequently, passing on their extra kinetic energy to other particles .(2)


    c) how is a convection current formed in the mug(4): liquid at the bottom is heated and particles gain kinetic energy and move away from each other, this makes the liquid less dense , causing it to rise and displace the denser colder liquid at the top , the denser particles then fall and is heated again.


    14) control variable for the investigation measuring rate of evaporation (1) : same beaker or same type of beaker, same position in the room., same thermometer .

    b) why is the data logger better(2): more accurate (1) , easier to read(1) , more precise (1) avoids human error (1)

    15 relationship of the graph comparing 3 types of beakers and their rate of evaporation(1): as time increases, rate of evaporation decreases.

    b) Beaker A(1) gradient of the line is the lowest and the final temperature is the highest of em all

    c) If investigation was repeated with lower volume , what effect would it have(1) : rate of evaporation will be higher (1)

    Why evaporation causes temperature to decrease (3): particles with enough kinetic energy and travelling in the right direction will escape the liquid and evaporate and take their kinetic energy with them , which means average kinetic energy of particles in liquid is lower and thus temperature is lower.

    16) why a vacuum reduces energy transfer (2) : no particles so stops energy transfer by conduction , convection.
    (Original post by ihatehannah)
    Completed mark scheme, hope it's clear and a good indication of what you got in the exam, good luck!
    1. Frequency ( 1)

    2. Echoes (1)

    3. spread out, same as (2)

    b) vibrations are parallel to the direction of energy transfer (2)

    4. Expensive as National Grid is a long distance away from rural areas (1)

    4b) ADVANTAGES
    constant supply, little variation in output
    £30k cheaper than wind turbine
    renewable resource
    doesn't produce as much noise as wind
    No CO2

    DISADVANTAGES
    could ruin ecosystem by preventing free movement of fish
    May need maintenance unlike wind
    Lower power output - 8W compared to 10W

    Wind - ADVANTAGES
    higher average output
    Needs little maintenance
    renewable resource
    Easily expanded
    No CO2

    DISADVANTAGES
    Eyesore
    noise pollution
    Wind speeds vary, meaning there could be times of under- or oversupply
    Costs 50k, 30k more than HEP (6)

    5. inefficient as less or little energy used to heat food as heat is lost as infrared radiation to the surroundings(2)

    uses of infrared(1) : remote controls, optical fibres

    uses of microwaves(1): mobile phones, satellites

    b) properties of microwaves and infra red radiation (2): can diffract, can refract, travel same speed in vaccuum, both transverse waves, can be reflected transverse• same speed (through air)• can be reflected• can be refracted• can be diffracted• can be absorbed• transfer energy• can travel through a vacuum• can be polarised• show interference

    calculation questions, 340 m/s for first one (2) then 78 degrees(3) , then 6.4 watts(2) then 0.07 degrees/s (2) efficiency question was 0.48 W (2)


    6. Fins increase surface area and black matt a are good absorbers of heat (2)

    7. cosmic microwave background radiation (1)

    b) provides evidence for the big bang theory (1)


    10. They keep costs as low as possible as efficiency does not increase as much but the cost goes up rapidly , ( give example and data figures to secure the marks) (2)


    11. why france will still use nuclear power(2) : cost of electricity is cheaper(1) and produces much more electricity(1) , produces no greenhouse gases like co2(1)

    12. Disadvantages of nuclear power stations(2): raw materials are non- renewable, high decommissioning costs, produces radioactive waste.

    13. factors that affect rate of energy transfer of mug(2): room temperature, surface area , how shiny it is( not sure about this one) and colour of the mug

    b) particles gain kinetic energy and collide more frequently, passing on their extra kinetic energy to other particles .(2)


    c) how is a convection current formed in the mug(4): liquid at the bottom is heated and particles gain kinetic energy and move away from each other, this makes the liquid less dense , causing it to rise and displace the denser colder liquid at the top , the denser particles then fall and is heated again.


    14) control variable for the investigation measuring rate of evaporation (1) : same beaker or same type of beaker, same position in the room., same thermometer .

    b) why is the data logger better(2): more accurate (1) , easier to read(1) , more precise (1) avoids human error (1)

    15 relationship of the graph comparing 3 types of beakers and their rate of evaporation(1): as time increases, rate of evaporation decreases.

    b) Beaker A(1) gradient of the line is the lowest and the final temperature is the highest of em all

    c) If investigation was repeated with lower volume , what effect would it have(1) : rate of evaporation will be higher (1)

    Why evaporation causes temperature to decrease (3): particles with enough kinetic energy and travelling in the right direction will escape the liquid and evaporate and take their kinetic energy with them , which means average kinetic energy of particles in liquid is lower and thus temperature is lower.

    16) why a vacuum reduces energy transfer (2) : no particles so stops energy transfer by conduction , convection.
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    (Original post by ProbablyJade)
    You had to convert from kWh's or something. The symbols were wrong
    did 25 have Hz next to it?
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    (Original post by Krish235)
    Yes, but if the wavelength is bigger than the gap, then there's more diffraction than if the wavelength and the gap are the same size.
    Well i don't know then, but most put the same as so they might be lenient on the markscheme
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    (Original post by ProbablyJade)
    Yes but the final temperature was lower than the initial, and the initial was 100, so the temperature wouldn't rise during evaporation
    Oh alright thanks
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    (Original post by Crème brûlée)
    That's what I thought
    Yh we are right don't worry, I double checked with my Physics teacher!
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    (Original post by ihatehannah)
    it's 78, 100 percent.
    Okay thanks just had to make sure.
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    (Original post by charliej2802)
    Did anyone else put 22 degrees, think i messed it up
    I got 22 degrees that would get us 2/3 marks as you then had to do 100-22 and get 78
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    For the specific heat capacity did it say it was heated from the beginning or it was going to be heated for 2 hours?
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    The temperature started at 100 degrees. As the liquid evaporated the temperature decreases because as it evaporates the particles leave the liquid taking thermal energy with them. The heat energy transferred to the surroundings came from the liquid. Question asks for final temperature (after the evaporation has taken place). So, it starts at 100 degrees and falls by 22 degrees so the final answer was 78 degrees.
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    I got 23100W for the power after 2 hours
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    (Original post by ProbablyJade)
    Question:
    1) For the gas flame question i put: because heat is lost to the surroundings as it is only concentrated on one section of the pan, and the efficiency is decreased because the flame also produces sound and light so not all of it is useful output
    2) For the mug question what effects the rate of transfer i put: amount of coffee in contact with the mug and the temperature difference between the coffee and the mug

    How many marks do you think i will get??
    Can anybody answer?
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    (Original post by TruthfulHoax)
    The temperature started at 100 degrees. As the liquid evaporated the temperature decreases because as it evaporates the particles leave the liquid taking thermal energy with them. The heat energy transferred to the surroundings came from the liquid. Question asks for final temperature (after the evaporation has taken place). So, it starts at 100 degrees and falls by 22 degrees so the final answer was 78 degrees.
    Thanks I got 122 so hopefully I get 2 marks.
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    Harshly marking: 53/60 (according to unofficial mark scheme).

    Is this good? What grade do you think it will be?
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    1. For why France uses nuclear, I wrote that because they make more than they use, they can sell the amount of energy that they don't use. Therefore, the can make money.
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    I ****ed the 6 marker. Didn't read the figure and compared wind to nuclear.
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    (Original post by ProbablyJade)
    Can anybody answer?
    1 for the whole lot.
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    see for the 25 kHz question, I accidentally divided by 1000 rather than multiply to get the Hz, so I got a really weird standard form answer but i used the right equation and all so would i get any sort of mark?
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    Question 13b was asking about conduction in NON-METALS, so the particles vibrate in their fixed positions, which is how they transfer energy
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    (Original post by Imas1501)
    I think they would accept that as that is pretty much the answer but you only forgot one word


    Posted from TSR Mobile
    I have read the examiner's report for another Unit 1 physics exam regarding the same question, they stated that they wouldn't give the mark because 'they didn't write down ALL' the words.
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    is that all the questions from the paper?
    (Original post by ihatehannah)
    Completed mark scheme, hope it's clear and a good indication of what you got in the exam, good luck!
    1. Frequency ( 1)

    2. Echoes (1)

    3. spread out, same as (2)

    b) vibrations are parallel to the direction of energy transfer (2)

    4. Expensive as National Grid is a long distance away from rural areas (1)

    4b) ADVANTAGES
    constant supply, little variation in output
    £30k cheaper than wind turbine
    renewable resource
    doesn't produce as much noise as wind
    No CO2

    DISADVANTAGES
    could ruin ecosystem by preventing free movement of fish
    May need maintenance unlike wind
    Lower power output - 8W compared to 10W

    Wind - ADVANTAGES
    higher average output
    Needs little maintenance
    renewable resource
    Easily expanded
    No CO2

    DISADVANTAGES
    Eyesore
    noise pollution
    Wind speeds vary, meaning there could be times of under- or oversupply
    Costs 50k, 30k more than HEP (6)

    5. inefficient as less or little energy used to heat food as heat is lost as infrared radiation to the surroundings(2)

    uses of infrared(1) : remote controls, optical fibres

    uses of microwaves(1): mobile phones, satellites

    b) properties of microwaves and infra red radiation (2): can diffract, can refract, travel same speed in vaccuum, both transverse waves, can be reflected transverse• same speed (through air)• can be reflected• can be refracted• can be diffracted• can be absorbed• transfer energy• can travel through a vacuum• can be polarised• show interference

    calculation questions, 340 m/s for first one (2) then 78 degrees(3) , then 6.4 watts(2) then 0.07 degrees/s (2) efficiency question was 0.48 W (2)


    6. Fins increase surface area and black matt a are good absorbers of heat (2)

    7. cosmic microwave background radiation (1)

    b) provides evidence for the big bang theory (1)


    10. They keep costs as low as possible as efficiency does not increase as much but the cost goes up rapidly , ( give example and data figures to secure the marks) (2)


    11. why france will still use nuclear power(2) : cost of electricity is cheaper(1) and produces much more electricity(1) , produces no greenhouse gases like co2(1)

    12. Disadvantages of nuclear power stations(2): raw materials are non- renewable, high decommissioning costs, produces radioactive waste.

    13. factors that affect rate of energy transfer of mug(2): room temperature, surface area , how shiny it is( not sure about this one) and colour of the mug

    b) particles gain kinetic energy and collide more frequently, passing on their extra kinetic energy to other particles .(2)


    c) how is a convection current formed in the mug(4): liquid at the bottom is heated and particles gain kinetic energy and move away from each other, this makes the liquid less dense , causing it to rise and displace the denser colder liquid at the top , the denser particles then fall and is heated again.


    14) control variable for the investigation measuring rate of evaporation (1) : same beaker or same type of beaker, same position in the room., same thermometer .

    b) why is the data logger better(2): more accurate (1) , easier to read(1) , more precise (1) avoids human error (1)

    15 relationship of the graph comparing 3 types of beakers and their rate of evaporation(1): as time increases, rate of evaporation decreases.

    b) Beaker A(1) gradient of the line is the lowest and the final temperature is the highest of em all

    c) If investigation was repeated with lower volume , what effect would it have(1) : rate of evaporation will be higher (1)

    Why evaporation causes temperature to decrease (3): particles with enough kinetic energy and travelling in the right direction will escape the liquid and evaporate and take their kinetic energy with them , which means average kinetic energy of particles in liquid is lower and thus temperature is lower.

    16) why a vacuum reduces energy transfer (2) : no particles so stops energy transfer by conduction , convection.
 
 
 
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