How did u guyz do in phys p1 ?

[mr.incredible]

i m sorry but really whatever i m saying i cross checked my sir.
for the wave i think it was ultravoilent ( do u remember the frequency or the wavelenght which was given if yes then i can give the exact answer right now)
for the car going up was D

I chose ultraviolet too. I think the gap width was 10^-5 m.

For the car going up, I chose C which was 0.5mv^2/2Fs.

Do you remember the answer to that crane lifting things up  ? I chose 5.5 KW

[mr.incredible]

By the way, Sabrina, what is your sir's expectations for the grade thresholds ??

[sabrina]

I chose ultraviolet too. I think the gap width was 10^-5 m.

For the car going up, I chose C which was 0.5mv^2/2Fs.

Do you remember the answer to that crane lifting things up  ? I chose 5.5 KW

same here 5.5kw is the ans

[[Spy]]

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

[sabrina]

By the way, Sabrina, what is your sir's expectations for the grade thresholds ??

sir says that the thresshold can be around 29 or 30 or 31. he himself said the question were very tricky

[[Spy]]

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 ?? 

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]

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

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

[sabrina]

#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

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]

@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

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