Recent content by khizman

so to work this formula out of, worst case % error = absoloute error (is that 4% or +/- 2mm?) / smallest reading ( 5cm? ) *100

Rounded Numbers --> error? Say i am measuring resistance of a wire, i have a voltmetre and an ammetre set up to work out the resistance. Votmetere says 1.45 and ammetre says 0.45, this wint be enirely aacurate would it? arnt the numbers rounded off on the screen? So what part does this...

but say i measure 5 cm isn't my crocodile clip affecting that length by 2mm plus or minus?

hmm so that mean when i meaure my length of 5 cm (50mm) it could be plus or minus 4% is that corect?

this plus or minus, in my case i don't have any plus or minus i don't think? I know that my crocodile clip was 2 mm so that must affect my length measurement in some way/

:confused: Anyone can explain to me what Absoloute Error is and what this means: Worst case % error = Absolote error/ Smallest reading * 100 For Voltmetre ______ % For Ammetere ______ % For Length _______ % For Diametre _______% _________________ Overall % error...

:confused: :redface: Hi got this question with which i need help For 1.0 mol of helium at a temprature 27deg C calculate:- i) the total kinetic energy of molecules, ii) the root mean square speed of the molecules

If two people - one weighing 10 stone and the other weighing 20 stone - both jump off a building who would hit the ground first? I know they would land at the same time but why?:confused:

:confused: ??

ok, also EMF is the amount of energy given per unit of charge (coulomb) what does it do to the electrons though?:shy:

I know its because the electrons stop the current but that's about all i Know! Any ideas also does internal resistance vary from rechargable and non rechargable batteries? thanks :D

OK I have been Taking AS Level Physics and my teacher isn't very good. I haven't done well in this test and I need to do the corrections over the half term holiday. http://img443.imageshack.us/img443/7987/scannedat2410200518561nu.jpg I'll be frank OMGWTFBBQ! How on Earth do you do this?

I really don't understand :cry:

:cry: http://img362.imageshack.us/img362/8182/untitled128sh.jpg how on Earth are you meant to do 3.9 i have tried using pythagoras's theorem but it doesn't work as i have the answer on the back of my book and it doesn't match up, any ideas?