Qualification > Sciences
How did u guyz do in phys p1 ?
sabrina:
--- Quote from: neno on May 20, 2010, 12:56:32 pm ---#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
--- End quote ---
yes sorry it was infrared.actually i forgot the wavelength which was given in the question.
abt the uncertainity i m sure its .5
the power question was 2 ohms(even i did 3ohms)
even i did the angle b\w 2&4 but the ans is 0 abt the density one it is specifically said in the questions that it contracts when it changes to liquid so the ans is B
neno:
w8....the question abt the ways...they gave the wavelength n asked wats the wave tht has it ryt...i think i read the question rong but i also chose C for the efficiency and i also converted the mm into m then i found the constant but i dont remeber wat my answer was...how abt the question abt emf and internalresistance i did emf(R1+R2)=I but i got a value that was to the power -4 and none of the answers vr so i jst chose the option which was to the power -3
neno:
sorry emf/R1+R2
sabrina:
--- Quote from: Spy on May 20, 2010, 01:00:21 pm ---@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
--- End quote ---
spy its infrared not UV
[Spy]:
IT DID NOT GIVE WAVELENGTHH!!!! IT SAID THIS IS A WIDTH THROUGH WHICH THEY PASS! AND IT SAID THAT THE WAVE DOES NOT DIFFRACT! THIS MEAN ITS WAVELENGTH HAD TO BE MUCH SMALLER THAN THE WIDTH! WHICH IS ULTRAVIOLET! god!
and sabrina please stop "enlightening" us with your teacher's answers, keep it to yourself
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