Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    1
    ReputationRep:
    (Original post by gy7gy7gy7)
    Wasnt the answer that x100 because there was x100 at the end of the equation?
    For a start that would be the efficiency, and because the efficiency was given in decimals not percent 'x100' wan't required
    Offline

    2
    ReputationRep:
    (Original post by trishka)
    I added it to the 100 to get 122
    Same here! Why would it be 78 rather than 122? I know it's a 22 degree difference but how would you know if you had to subtract or add 22 to 100?

    Edit: Wait, because it was cooling down. I feel rather stupid now ignore me
    Offline

    2
    ReputationRep:
    nah, u only multiply by 100 to find the efficiency, the question was asking for the power output/input, cant remember, you will probably get good marks for working tho
    Offline

    11
    ReputationRep:
    Six marker:

    HEP - 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



    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by milolj)
    I put that aswell i think its wrong
    You taake 100 degrees from 22 and get 78
    Offline

    2
    ReputationRep:
    (Original post by gy7gy7gy7)
    Wasnt the answer that x100 because there was x100 at the end of the equation?
    you will still get the mark as the markscheme would allow it as a decimal or a percentage only if you put the % sign next to it
    Offline

    11
    ReputationRep:
    (Original post by wildjones)
    Same here! Why would it be 78 rather than 122? I know it's a 22 degree difference but how would you know if you had to subtract or add 22 to 100?
    Because it said the heat was transferred to the surroundings, as well as the question being about cooling water.

    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    I am really stressed about this question 😂
    Is anyone sure what the answer is because I wrote 122 degrees
    Offline

    0
    ReputationRep:
    Hey guys can you improve your ISA after the exams have finished?
    Offline

    11
    ReputationRep:
    (Original post by SmithAmelia)
    I am really stressed about this question 😂
    Is anyone sure what the answer is because I wrote 122 degrees
    I'm pretty sure it was 78 because the question was about evaporation, and cooling and also mentioned that heat was transferred to the surroundings. Might be wrong tho

    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by wildjones)
    Same here! Why would it be 78 rather than 122? I know it's a 22 degree difference but how would you know if you had to subtract or add 22 to 100?

    Edit: Wait, because it was cooling down. I feel rather stupid now ignore me
    same, I feel stupid now after adding it
    Offline

    1
    ReputationRep:
    Do you guys think that I would have gotten the mark for saying that disadvantages of nuclear power staions are that:
    1. They can't be turnt off
    2. Decommissioning is expensive
    Offline

    2
    ReputationRep:
    (Original post by charliej2802)
    Did anyone else put 22 degrees, think i messed it up
    I got 22 degrees as well, but think you might have had to subtract that from 100. Still will get a mark for working out method though
    Offline

    16
    ReputationRep:
    Anyone remember what the question was for the one after the 78 degrees one. It was something to do with power output. My friends said something about multiplying by 60. And I didn't do that!!!

    The answer was something to do with watts if that helps!
    Offline

    2
    ReputationRep:
    (Original post by habeeb_00)
    I'm pretty sure it was 78 because the question was about evaporation, and cooling and also mentioned that heat was transferred to the surroundings. Might be wrong tho

    Yeah I just realised it was cooling down so 122 is wrong. Hopefully I'll still get the method mark.Thanks though!
    Posted from TSR Mobile
    Yeah I just realised it was cooling down so 122 is wrong. Hopefully I'll still get the method mark.Thanks though!Posted from TSR Mobile[/QUOTE]
    Offline

    2
    ReputationRep:
    (Original post by trishka)
    I got that too
    I got that
    Offline

    7
    ReputationRep:
    (Original post by B3ASTy)
    for the rural one could i have put that it would be expensive connecting to the national grid so the amount of electricity generated wouldn't be worth it?
    yeah same, i also said it was far away and not a lot of people lived there
    Offline

    2
    ReputationRep:
    (Original post by srmed)
    you will still get the mark as the markscheme would allow it as a decimal or a percentage only if you put the % sign next to it
    this was about useful energy out not efficiency
    Offline

    1
    ReputationRep:
    What did people put for the similarities between infrared and micro waves?
    Offline

    7
    ReputationRep:
    (Original post by wildjones)
    Same here! Why would it be 78 rather than 122? I know it's a 22 degree difference but how would you know if you had to subtract or add 22 to 100?

    Edit: Wait, because it was cooling down. I feel rather stupid now ignore me
    if i put 22 as the answer and the question was three marks would I still get two marks?
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.