Physics: Post your doubts here!

[anastasia grey113]

I got the percentage uncertainty in both values y and x separately and added them. Is this wrong ?

but that methods for two values which multiply or divide...isn't it?

 

[amina1300]

lol yes
overall it was an easy paper
except for that errors n improvements part

yeah I guess one of mine was invalid too.

 

[anastasia grey113]

yeah I guess one of mine was invalid too.

what did u write?

 

[amina1300]

but that methods for two values which multiply or divide...isn't it?

I dont know but I used 2 (0.1) / values i got ( in cm).

 

[anastasia grey113]

I dont know but I used 2 (0.1) / values i got ( in cm).

for ruler absolute certainty is 0.5mm
n units should be the same so i converted cm value to mm

 

[amina1300]

what did u write?

Length of the strings. --> equal
more readings and graph.

 

[anastasia grey113]

Length of the strings. --> equal
more readings and graph.

but weren't they equal already?
n that graph one is definitely correct

 

[amina1300]

i

for ruler absolute certainty is 0.5mm
n units should be the same so i converted cm value to mm

Its 1 mm actually.

 

[anastasia grey113]

i

Its 1 mm actually.

idk i asked someone
she said its 0.5 mm

 

[amina1300]

but weren't they equal already?
n that graph one is definitely correct

I wrote ensure they were equal because it wasnt mentioned and the others I kinda forgot..

 

[amina1300]

s

idk i asked someone
she said its 0.5 mm

search it up

 

[anastasia grey113]

sensitivity is 1mm
minimum error is 0.5mm
n minimum error is what v use here

 

[anastasia grey113]

I wrote ensure they were equal because it wasnt mentioned and the others I kinda forgot..

ohh okay
but that can be a valid point

 

[anastasia grey113]

s

search it up

searched it
its 0.5mm
but 1 is also written somewhere

 

[amina1300]

What was ur reading for the length of paper clip though? mine was 3.cm

 

[anastasia grey113]

What was ur reading for the length of paper clip though? mine was 3.cm

mine was 3.2

 

[amina1300]

searched it
its 0.5mm
but 1 is also written somewhere

The quoted uncertainty of a length measurement using a meter rule is therefore ±1 mm.
https://www.patana.ac.th/secondary/science/.../accuracy and precision.html
its 1mm .

 

[anastasia grey113]

how do u rate the paper?
was it easy or hard?

 

[amina1300]

mine was 3.2

3.1 cm.

 

[anastasia grey113]

The quoted uncertainty of a length measurement using a meter rule is therefore ±1 mm.
https://www.patana.ac.th/secondary/science/.../accuracy and precision.html
its 1mm .

The sensitivity of a meter rule is 1mm, the possible error being half the sensitivity is±0.5mm. Percentage uncertainty is equal to your (possible error/recorded measurement)x100, this varies depending on the magnitude of your measurement.
https://www.thestudentroom.co.uk/showthread.php?t=887931