Qualification > Sciences
How did u guyz do in phys p1 ?
[Spy]:
--- Quote from: mr.incredible on May 20, 2010, 12:18:21 pm ---Did you convert the mm into m ?
Can you tell me the steps you did for the uncertainty. I can tell you mine. I subtracted maximum mass of of beaker + liquid from minimum mass of empty beaker and divided minimum volume of liquid by this answer. Do you remember the values and uncertainty of each ?? :D
--- End quote ---
you didnt have to convert because at the end i divided by 5mm which would give the same value if you converted to meters first then diviided by 0.005
neno:
#for the ice-water question i chose tht the spacing increase(cuz particles move apart start sliding...)and the density decreases(cuz the volume increases since spacing increase)
#for the question abt the waves 10^(-5) i chose infrared(cuz light itself is 10^-7 to 10^-5.sumthing)
#the question abt the uncertainity i chose 0.6
#the power question i jst guessed and chose 3ohms
#for the lithium question i chose A
#towards the observer was the answer i chose for tht field question
not sure abt the rest wat did u guys put for the minimum resultant force when 3,4,5n are at random angles i put
between 2 and 4 but i think its rong most of my frnds did 0
sabrina:
--- Quote from: Spy on May 20, 2010, 12:52:29 pm ---guys the effeciency IM 100% sure its C mv^2/2FS dont tell me sir or whatever its simplee!!
effeciency=work/energy input
work = kinetic energy change = 0.5mv^2
and energy input is always equal to the work done by driving force= Fs
there fore 1/2 * mv^s/Fs= mv^2/2fs
--- End quote ---
spy plz show some respect towards teachers. even my friends and my classmate boys did this but sir showed us the whole working and atlast he got the ans D (he did something and the varables got cancel out)
XaM!!:
Hey it was nt ultraviolet, it was infra red... n uncertainity ws 0.5
[Spy]:
@sabrina, okay your teacher is amazing happy? :)
it was ultraviolet because it didnt diffract at 10^-5 width! and therefore it had to be much smaller, which is ultraviolet
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