'Physics Unit 6B: Experimental Physics' help needed for the written paper

[Aaron Rodrgp]

i really need help for this, just 3 days left for the exam and i don't know what to study. please give me a descriptive list of things i should study so that i can get an A. any notes, predictions or information and tips will be extremely appreciated!! Please help me. Tell me everything i need to know to get an A for this paper. Thanks in advance!!

 

[Vj Destiny]

i really need help for this, just 3 days left for the exam and i don't know what to study. please give me a descriptive list of things i should study so that i can get an A. any notes, predictions or information and tips will be extremely appreciated!! Please help me. Tell me everything i need to know to get an A for this paper. Thanks in advance!!

http://www.pdfonline.com/convert-pd...84ac84a4c469f8255709f74428361/phypraclist.pdf

 

[Vj Destiny]

i really need help for this, just 3 days left for the exam and i don't know what to study. please give me a descriptive list of things i should study so that i can get an A. any notes, predictions or information and tips will be extremely appreciated!! Please help me. Tell me everything i need to know to get an A for this paper. Thanks in advance!!

http://www.scribd.com/doc/118963448/Edexcel-Physics-Practical-A2

 

[Aaron Rodrgp]

Thanks soooo much!! but everytime they give an experiment, its something to differnt to what they have given in their list. for example, in a past paper, instead of the beta radiation measuremnt experiment, it was aplha radiation distance measuremnt.

 

[Nofel Mehmood]

any paper leaks? lol

 

[Sana salim]

any paper leaks? lol

ya any leaks please help

 

[maths maldives]

can someone help me with this question please!
*thickness of the foil is 15 micrometer. precision of micrometer is 0.01millimeter.
so what is the percentage uncertainty?

 

[Sana salim]

0.01/15 *100........where is this question from

 

[Nofel Mehmood]

can someone help me with this question please!
*thickness of the foil is 15 micrometer. precision of micrometer is 0.01millimeter.
so what is the percentage uncertainty?

convert 15 micrometer to millimeters. Then precision over the reading x 100%, i think. check and let me know.
0.01/0.015 x 100% = 66.7%

 

[Nofel Mehmood]

0.01/15 *100........where is this question from

thats wrong coz you have to convert micrometers to millimeters.

 

[qstar.inc]

ya any leaks please help

rare case... dnt wait for it

 

[maths maldives]

0.01/15 *100........where is this question from

this question was from my mock exam!
i wrote 0.01 mm/0.015 mm * 100!
but it was wrong!
my teacher have corrected it as 15 micrometer!
but, i think we have to convert it to millimeters, right?
im confused???????........

 

[Nofel Mehmood]

this question was from my mock exam!
i wrote 0.01 mm/0.015 mm * 100!
but it was wrong!
my teacher have corrected it as 15 micrometer!
but, i think we have to convert it to millimeters, right?
im confused???????........

Yes, has to be converted to millimeters. I gave the answer.

 

[maths maldives]

Yes, has to be converted to millimeters. I gave the answer.

but, when converted, it give a big answer of 66.6%!
do you think it will be correct?

 

[Irfan1995]

It really doesn't matter. But you must make sure that the numerator and denominator are BOTH in either millimeters OR micrometers (you can't have one in millimeters and the other in micrometers)
So you will get a 66.7% uncertainty, which makes sense. I mean, you're measuring a 15 micrometer item with an instrument with a 10 micrometer uncertainty.
So that's why you would be asked to fold the foil 4 or 5 times (to increase the thickness by a factor of 16 or 32) before measuring the thickness. If you fold it by 4 times, the total thickness would be 15 * 16 = 240 micrometers. So the %U would be only 4.17%
Hope that makes sense.

 

[maths maldives]

It really doesn't matter. But you must make sure that the numerator and denominator are BOTH in either millimeters OR micrometers (you can't have one in millimeters and the other in micrometers)
So you will get a 66.7% uncertainty, which makes sense. I mean, you're measuring a 15 micrometer item with an instrument with a 10 micrometer uncertainty.
So that's why you would be asked to fold the foil 4 or 5 times (to increase the thickness by a factor of 16 or 32) before measuring the thickness. If you fold it by 4 times, the total thickness would be 15 * 16 = 240 micrometers. So the %U would be only 4.17%
Hope that makes sense.

i got it! thank you very much! good luck if you're doing 6B!