The Student Room Group

Edexcel physics higher paper 1 gcse (single science)

How did you guys find it? Post answers and prediction for grade boundaries
It was ight :s-smilie:
lots of people found it ok. I think they'll be a little lower than last year. Maybe 56/57 for a 7
Original post by ArtmisKco
How did you guys find it? Post answers and prediction for grade boundaries
Yeh I think so too! It was ok for me but for the others... well they were devastated
I personally thought it was easy-okay but some people who didnt revise certain topics found it impossible
You were meant to calculate how many half-lives there were (it was three half-lives because 1000000/2= 500000 then 500000/2=25000 then 25000/2=125000 so there is a total of three then you times 5700 by three which is how many years old that is

Hope that's help
Original post by Dayo03
for the half-life one I got 9975


because it said its half-life was 5700. it had 1000000 radiation in it. so that means in 5700 it has emitted 500,000. The question asked how old is the tree after emitting 875,000. I did 875,000 / 500,000 and got 1.75. 1.75 x 5700 is 9975


I really don't know if this is right tho
Original post by Tayyeb1322
You were meant to calculate how many half-lives there were (it was three half-lives because 1000000/2= 500000 then 500000/2=25000 then 25000/2=125000 so there is a total of three then you times 5700 by three which is how many years old that is

Hope that's help


ohh right, thank you so much. That makes sense. I guess I just flopped physics after months of late nights because of physics lol.
I'm actually an idiot, it's so easy and most other people got it *facepalm*
Original post by Tayyeb1322
You were meant to calculate how many half-lives there were (it was three half-lives because 1000000/2= 500000 then 500000/2=25000 then 25000/2=125000 so there is a total of three then you times 5700 by three which is how many years old that is

Hope that's help
I multiplied 5700 by 3 as well but no body got the same answer as me so I was questioning myself If i got the half life question right. Everybody in my class got 44000 or like 19000 or something
Don't worry, I asked my teacher and he said that it should be correct
Original post by ArtmisKco
I multiplied 5700 by 3 as well but no body got the same answer as me so I was questioning myself If i got the half life question right. Everybody in my class got 44000 or like 19000 or something
:smile:

Quick Reply