MissMathsxo
Badges: 12
Rep:
?
#1
Report Thread starter 1 year ago
#1
When measuring with a ruler, does the AQA syllabus require you to double uncertainty at one end to get an overall uncertainty or do they just do it for one side
Thank you
0
reply
forgotten_one
Badges: 16
Rep:
?
#2
Report 1 year ago
#2
(Original post by MissMathsxo)
When measuring with a ruler, does the AQA syllabus require you to double uncertainty at one end to get an overall uncertainty or do they just do it for one side
Thank you
No idea what you're talking about. Could you please expand?
0
reply
forgotten_one
Badges: 16
Rep:
?
#3
Report 1 year ago
#3
The uncertainty is +-the smallest division of the measuring instrument. Hope this helps.
2
reply
Unknown-99
Badges: 19
Rep:
?
#4
Report 1 year ago
#4
(Original post by MissMathsxo)
When measuring with a ruler, does the AQA syllabus require you to double uncertainty at one end to get an overall uncertainty or do they just do it for one side
Thank you
I don't know about AQA but for the SQA (Scottish qualifications) the reading uncertainty in a ruler is taken to be +/- 0.5mm and a STEEL ruler is taken to be +/- 0.1mm.
0
reply
MissMathsxo
Badges: 12
Rep:
?
#5
Report Thread starter 1 year ago
#5
(Original post by forgotten_one)
No idea what you're talking about. Could you please expand?
Basically, uncertainty is normally half the division but I hear that for rulers e.g. Of resolution 1mm the uncertainty would be +-1mm rather than the expected 0.5mm due to uncertainty at both ends of the ruler. Is this right?
0
reply
forgotten_one
Badges: 16
Rep:
?
#6
Report 1 year ago
#6
(Original post by Unknown-99)
No that is not right. It is +/- 0.5mm like you said.
I believe it is different in AQA. What board are you doing?
0
reply
Unknown-99
Badges: 19
Rep:
?
#7
Report 1 year ago
#7
(Original post by forgotten_one)
I believe it is different in AQA. What board are you doing?
I did the SQA exams. Wouldn't it just be the same though because it's scientifically correct to assume the uncertainty in a ruler is half of the smallest division?
0
reply
DarthRoar
Badges: 19
Rep:
?
#8
Report 1 year ago
#8
AQA Physics dictates that a ruler has an uncertainty of +- 1mm. This is because 2 measurements are being made (start and end of the ruler), so the +- 0.5mm occurs twice.
0
reply
Unknown-99
Badges: 19
Rep:
?
#9
Report 1 year ago
#9
(Original post by DarthRoar)
AQA Physics dictates that a ruler has an uncertainty of +- 1mm. This is because 2 measurements are being made (start and end of the ruler), so the +- 0.5mm occurs twice.
Fu*k the AQA. Fu*k the SQA. Fu*k all these pi**ing exam boards.
0
reply
MissMathsxo
Badges: 12
Rep:
?
#10
Report Thread starter 1 year ago
#10
(Original post by DarthRoar)
AQA Physics dictates that a ruler has an uncertainty of +- 1mm. This is because 2 measurements are being made (start and end of the ruler), so the +- 0.5mm occurs twice.
Thank you, so the attached rules are correct?Name:  89544A30-879C-48FB-9793-ABCAD329BFF8.jpg.jpeg
Views: 48
Size:  47.3 KB
0
reply
DarthRoar
Badges: 19
Rep:
?
#11
Report 1 year ago
#11
(Original post by Unknown-99)
Fu*k the AQA. Fu*k the SQA. Fu*k all these pi**ing exam boards.
Well in this case AQA isn't wrong.
0
reply
forgotten_one
Badges: 16
Rep:
?
#12
Report 1 year ago
#12
(Original post by Unknown-99)
I did the SQA exams. Wouldn't it just be the same though because it's scientifically correct to assume the uncertainty in a ruler is half of the smallest division?
Yeah, I agree. But its written in the AQA specification. I am doing OCR A physics btw and the uncertainty is calculated in the same way as your board.
0
reply
Unknown-99
Badges: 19
Rep:
?
#13
Report 1 year ago
#13
(Original post by forgotten_one)
Yeah, I agree. But its written in the AQA specification. I am doing OCR A physics btw and the uncertainty is calculated in the same way as your board.
Ah don't you just love exam boards and their inconsistency?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

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.

Personalise

University open days

  • Bournemouth University
    Undergraduate Open Day Undergraduate
    Wed, 19 Feb '20
  • Buckinghamshire New University
    Postgraduate and professional courses Postgraduate
    Wed, 19 Feb '20
  • University of Warwick
    Warwick Business School Postgraduate
    Thu, 20 Feb '20

Has your university offer been reduced?

Yes (42)
32.06%
No (68)
51.91%
Don't know (21)
16.03%

Watched Threads

View All
Latest
My Feed