Physics: Post your doubts here!

[Zaki ali asghar]

can you tell any error and improvements for scale balance experiment?

 

[GarryTheGhost]

can you tell any error and improvements for scale balance experiment?

man i would of it i knew what the heck it was.........

 

[Zaki ali asghar]

do you have any more info?

 

[GarryTheGhost]

do you have any more info?

Thats all i know........ This morning i found out that there were no electrical apparatus for the practical and now a a user by the name of amina1300 told me that her school predicted that paper clip oscillations and scale weight balancing is coming.... the oscillations part is gonna be doable but the scale weight balancing,... i have never done anything. Partly because i skipped so many practical sessions. Have you done any forces practicals?

 

[Zaki ali asghar]

i did one where we had to pull a block up the board using a newton meter.

 

[GarryTheGhost]

i did one where we had to pull a block up the board using a newton meter.

yea i've seen that...... have you done anything with regarding center of gravity?

 

[Zaki ali asghar]

nope

 

[GarryTheGhost]

nope

dude did you draw a graph for that newton meter experiment?

 

[Zaki ali asghar]

nah that was the second question,no graph

 

[GarryTheGhost]

nah that was the second question,no graph

i'm gonna guess oscillations of paper clips with graphs where the period is propotional to the sq root of length and the 2nd part is gonna end up being something to do with density hence the scales are used

 

[nawaal101]

in some Qs they ask for repeat readings... how am i supposed to do them and show 'em on the paper?

 

[selrey]

Guys, to how many sig fig could we write the gradient?

 

[amina1300]

any more tips for physics 33 tomorrow?

how did ur practical go?

 

[anastasia grey113]

question 2 was too easy and thats what the problem was
there were no errors or improvements i could think off but i wrote the following....some of em may sound silly tho
errors
1-not enough readings
2-too small change to be measured with metre rule
3-metre rule kept rotating causing difficulty in reading
4-there was always a force being applied by hand during release causing ruler to unbalance

improvements
1-take more readings
2-use a wire or thinner thread but of same strength around wire
3-use a travelling microscope
4-use a mechanical hand during release

i doubt the last two improvements n the 2nd and last error so i might score a four out of 8 :/

 

[anastasia grey113]

btw what was the %age uncertainty?

i did it like
(0.5+0.5)/5 x 100% so i got 20% since my reading was 5mm

 

[amina1300]

btw what was the %age uncertainty?

i did it like
(0.5+0.5)/5 x 100% so i got 20% since my reading was 5mm

I dont recall the 5 mm reading which Question was this.

 

[anastasia grey113]

I dont recall the 5 mm reading which Question was this.

question 2
this was x-y i calculated

 

[amina1300]

question 2
this was x-y i calculated

You mean y-x right

 

[anastasia grey113]

You mean y-x right

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

 

[amina1300]

You mean y-x right

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