Physics paper 31 , (a death call)

[BurakBurak]

You got it wrongly man

 

[bluefa1con]

if its 6 v then the current would be equal to 3 since the resistance was 3! he told you the current was 0.8 and parralel have the same voltage so 2.4 up and 2.4 down so the current down was equal to 2.4/2 which was 1.2

you had to solve the question according to the values given
if they give the current in one branch as 0.8 A its part of the question and doesnt affect the second branch

 

[MNU]

what was the answer of the last part in the piston question? that question about air bubbles!

 

[bluefa1con]

You got it wrongly man

sorry bro your answer is wrong

 

[BurakBurak]

The circuit contains one more parallel resistance I think you need to wear glasses man

 

[bluefa1con]

what was the answer of the last part in the piston question? that question about air bubbles!

air is compressible so force not be affectively transferred

 

[BurakBurak]

Lets wait and see then bro

 

[bluefa1con]

The circuit contains one more parallel resistance I think you need to wear glasses man

you need to wear a brain -_-
read my post again

there was one parallel circuit and one series circuit

 

[bluefa1con]

Lets wait and see then bro

i got my answer confirmed from multiple sources

 

[Ahmedboombox]

this i wrote in the first part when they asked abouy the force...but for this i wrote about work done force is inversely proportional to distance...wat u thnk?

Well piston Y had a larger Area and larger Force hence pressure will be less acting on piston Y pushing it a samller distance than piston X , that is what i wrote.
Inshallah we will All get A*'s say Amen.

 

[BurakBurak]

Just wait and we will see bro wait

 

[bluefa1con]

Well piston Y had a larger Area and larger Force hence pressure will be less acting on piston Y pushing it a samller distance than piston X , that is what i wrote.
Inshallah we will All get A*'s say Amen.

they wrote that pressure is same
the thing is it has more area and volume so less movement

 

[bluefa1con]

Just wait and we will see bro wait

have a look http://en.wikipedia.org/wiki/Series_and_parallel_circuits
idk where you got the idea that voltage somehow magically divides in a parallel circuit
lol its aginst the simple rules of electronics

 

[Ahmedboombox]

they wrote that pressure is same
the thing is it has more area and volume so less movement

Pressure is the same across the oil , not across the pistons. Anyway's what is done is done .

 

[bluefa1con]

Pressure is the same across the oil , not across the pistons. Anyway's what is done is done .

f1 /A1 = F2 /A2
we had this in our book on that pressure transmission thingy

 

[Ahsan786]

Hey guyz wht about the relationsip one of the current in electricity question?????

 

[Hamzeh S]

Hey guyz wht about the relationsip one of the current in electricity question?????

I2 and I3 are equal to the I1 or I4 forgot which one

 

[svenas]

I think this is the ryt solution:

 

[kim anika]

yeah it was to da right[/quot
hey if we use flemings right hand rule which is to find the current then the current direction comes to the left......to find the direction of current we use flemings right hand rule and to find the direction of motion we use left hand rule ?????? plz someone tell me i am right

 

[Abu mota]

Alright guys
Super summary of what I got, agreeing with others answers:
First question, answer was 1.8s since it was most frequent
And then to measure oscillation , count multiple (at least ten) , use stopwatch to time those ten, divide stopwatch answer by ten or whatever no. you use
Err for the glass flask and tube,
i) It lowers because the heat expands the flask causing it to hold a bigger volume and the liquid thus lowers to fill the volume
ii) It then raises because as the liquid is heated up it expands and this causes it to take up a larger volume
iii) The reason why the rise is greater than the fall is cause either liquids expands more than solids or because the liquid had much more volume than solid so even with lower expansivity it would have a total expansion more than that of solid
iv)to make the rise more you could decrease diameater of tube

Max speed was DEFINITELY 9.33m/s, checked with many people. I even remember; it was 280/30, and I used multiple points on the line to check
Average speed was 6.67
Last question, A was resistor and B was LDR and for heat circuit A should be thermistor and B should be resistor, and component Y was a transistor
For question about solar panel all I remember is that the max height of the jet was 1.15 using potential energy formula
The current was going towards right, the beta stream goes out of the page, the magnetic field was obv straight lines from N to S pole, the beta stream's DESCRIPTION of movement was curving out till it's perpendicular to magnetic field lines going out of page
PRessure...err, first one was 18.75N/CM2 - note CENTIMETERS SQUARED, can't use pascals unless you change cm to m.
The reason force at Y is more than force at X is because pressure is the same at X and Y but since the area of Y is much bigger the force must be bigger to so the pressure can stay the same
THe reason Y moves a smaller distance is cause the work done at X and Y is the same (law of conservation of energy, no energy can magically appear so all the energy used to push X will go to Y) Work done = Force*Distance, since Y has a greater force it must move a smaller distance to have same work done.

hi. i disagree with the expansion thingy, because solids expansion isnt actually that noticeable and how can a solid expand before a liquid does? thats against the basic rules it is known that liquids expand more and faster. so i think that the answer should be evaporation caused the loss and one was bigger than the other because surface area for evaporation is too small while the surface area exposed to heat at the bottom is alot bigger. ty