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Physics: Post your doubts here!

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emeffy

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hey guys, i need help for paper 3 physics. How do you calculate for maximum error or percentage error? coz sometimes u gotta use the error given but sometimes u gotta multiply it by two, sometimes divide it by half and so on. and is there a basic list of limitations and improvement parts that we can refer too? Please n thanx yall. Love from Malaysia.
 
A.ELWY 7

A.ELWY 7

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emeffy said:
hey guys, i need help for paper 3 physics. How do you calculate for maximum error or percentage error? coz sometimes u gotta use the error given but sometimes u gotta multiply it by two, sometimes divide it by half and so on. and is there a basic list of limitations and improvement parts that we can refer too? Please n thanx yall. Love from Malaysia.
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u mean percentage uncertanity?? or did i miss that error part?
 
A

Anonymous'

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allysaleemally said:
How do you find the uncertainty in the length???? the question is physics practical P3???
Thank a million![/quote

It depends on what instruments we are using, if it is metre rule, the uncertainty is 0.1 cm, if it is vernier caliper, then, the uncertainty is 0.01 cm whereas micrometer screwgauge has uncertainty of 0.001 cm.. heheh :)

btw, take note that for SINGLE reading, the uncertainty is half of the smallest division, but it is very rare, because if we measure any things, we measure them from two readings, like for example, if we want to measure the length of a pencil, we measure it from 0 cm to 7 cm (example) , so that is considered as two readings, so, the uncertainty will be 0.1 cm.. ;)
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Unicorn

Unicorn

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Guys can someone help me please. My AS practical exam is in 2 days and the teacher told us that 90% chance that electricty (judging by previous papers) is not coming which leaves only mechanical physics (don't scream and shout if electricty comes) . So i have a few questions

1) when attaching springs in series do you measure the extension of 1 spring or all of them?
2) when attching springs in parallel do you take the average extension of the springs because they all don't extend by same amount exactly

Thanks :D
 
code11

code11

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if the distance between the double slits is increased ,while other things are constant,what is the effect on fringe sepration and brightness of frings ? :confused:
 
Unicorn

Unicorn

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code11 said:
if the distance between the double slits is increased ,while other things are constant,what is the effect on fringe sepration and brightness of frings ? :confused:
Click to expand...

well the sepration will be halved and so will the brightness i presume
 
mushoo

mushoo

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can we take out the y- intercpt of the graphs of the practical, by using the equation?? :/
 
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geek101

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  • Can someone please say the uncertainty, error and the uncertainty we use when calculating the % uncertainty for a meter rule, a vernier caliper and a stopwatch?? thank you...and good luck folks!
 
code11

code11

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