Qualification > Sciences

VERY VERY URGENT!!!!!!!!!!!!!!!!!

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halosh92:
could someone plz tell me how to calcualte the uncertainity of time in the practical???
and if i take the reading 3 times do i get the average of these readings and find the uncertainity..HOW EXACTLY?
and the ms they say take half the uncertainity??? :o ??? ???

nid404:
huh?

We take the smallest scale on the instrument
fractional uncertainty= +/- smallest unit/ value
if ur using a stopwatch, it usually has an error of +/- 0.01s
if ur using a watch, with the second hand, it has an error of +/- 1s

halosh92:

--- Quote from: nid404 on April 18, 2010, 06:50:24 pm ---huh?

We take the smallest scale on the instrument
fractional uncertainty= +/- smallest unit/ value
if ur using a stopwatch, it usually has an error of +/- 0.01s
if ur using a watch, with the second hand, it has an error of +/- 1s


--- End quote ---

alright wat if i have repeated the reading thrice??

and By the way for any gradient.....on a graph....do we have to write a unit for the gradient?

nid404:

--- Quote from: halosh92 on April 18, 2010, 07:04:05 pm ---alright wat if i have repeated the reading thrice??

and By the way for any gradient.....on a graph....do we have to write a unit for the gradient?

--- End quote ---

no...slope has no units usually...
unless for eg...they tell u...find acc from vel/time graph....then the slope is the acc....gttn it?

use the average value

halosh92:

--- Quote from: nid404 on April 18, 2010, 07:05:42 pm ---no...slope has no units usually...
unless for eg...they tell u...find acc from vel/time graph....then the slope is the acc....gttn it?

use the average value

--- End quote ---

YESS THANKX ALOT NID :D

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