IGCSE Physics Paper 1 Variant 1

[JimmyCarter]

which one??

-Liquid expanding
-Its 84 because pressure of gas =atmospheric pressure + difference in height

My whole class said it was 68. i did 84 but apparently the pressure is decreasing so the right thing is the opposite to what u and me have done

 

[JimmyCarter]

The iron bars would be repelled.. there is always an opposition at the ends of the coil! I think so..

no they would attract, rmmbr they are just iron rods and not magnets. anyways dont worry yourself much think about the rest

 

[JimmyCarter]

A ! It would drop from 12 to 0!

I DID THAT TOO!! but every1 says its wrong!!

 

[JimmyCarter]

The answer for the boat qn was to make the gap smaller.. this will prevent the waves from reaching the boat

no the answer is bigger, if u make the gap bigger then there will be less curving in the shape of the wave, thus not touches the boat

 

[JimmyCarter]

What About CAKE QUESTION anybody did it ?

it was niice. i got 59.9 for an answer

 

[Reem2195]

A ! It would drop from 12 to 0!

what was the question?

 

[Reem2195]

What about the energy question at the start?
When temp increases by 20 and falls by 10.

 

[JimmyCarter]

how is it constant resistor?? if its a constant resistor then the resistance would be constant, duh!! and by referring to the graph the voltage increased as the current increased, so it's a capacitor..

its a constant resistor buddy. it was even a past paper question and the mark scheme said it was a constant resistor

 

[AhmedMans]

About the moment question, it rotates anti clockwise right? And about the wave thing I think I got it wrong, I made it smaller.

 

[JimmyCarter]

What about the energy question at the start?
When temp increases by 20 and falls by 10.

yess thats correct. you can prove it by proportionality

 

[AhmedMans]

What about the energy question at the start?
When temp increases by 20 and falls by 10.

It decreases by 40 I think. A

 

[JimmyCarter]

i dont think thats correct

 

[Reem2195]

About the moment question, it rotates anti clockwise right? And about the wave thing I think I got it wrong, I made it smaller.

I wrote downwards but I think it's wrong.
It probably should've been "doesn't move"

 

[AhmedMans]

I wrote downwards but I think it's wrong.
It probably should've been "doesn't move"

I chose "doesn't move" but the thing is that one was higher than the other thus greater moment, I didn't remember that during the exam :/

 

[JimmyCarter]

I wrote downwards but I think it's wrong.
It probably should've been "doesn't move"

i cant be downwards becuase there is a pivot, it will exert the same force upwards. i chose it doesnt move but its wrong

 

[Reem2195]

yess thats correct. you can prove it by proportionality

so it falls by 40J?
btw, your signature is epic

 

[Reem2195]

what was the right answer then? :/
I didn't choose clockwise/anticlockwise because there was a for of 100N in both directions so I though
t they would cancel each other out...

 

[JimmyCarter]

so it falls by 40J?
btw, your signature is epic

Lololol hahaha its true tho or atleast i like to believe that Yes that was the right answer btw

 

[JimmyCarter]

unfortunatley not moving is not the answer, we should have taken into account the length between the two forces. But maybe we are right, lets just wait and see.

what was the right answer then? :/
I didn't choose clockwise/anticlockwise because there was a for of 100N in both directions so I though
t they would cancel each other out...

 

[mow]

for the potentimeter thingy, was it 0-12 or 12-0