Physics, Chemistry and Biology: Post your doubts here!

[Mr.Physics]

Guys how can person calculate his/her grade using the grade thresholds?

Ok for example in may june 2014 the grade threshold for an A* was 139/200. However the total marks for chemistry are 180 as p1=40,p3=80,p6=60

so make an equation ,

n/180=139/200
n=(139/200) x 180
n=126

So the marks required for an A* will be 126/180 . (Not sure about this method)

 

[shingiechingz@8]

Ok for example in may june 2014 the grade threshold for an A* was 139/200. However the total marks for chemistry are 180 as p1=40,p3=80,p6=60

so make an equation ,

n/180=139/200
n=(139/200) x 180
n=126

So the marks required for an A* will be 126/180 . (Not sure about this method)

so if l have 122/180 what would l have for instance.........................

 

[shingiechingz@8]

Anyone who is doing PHYSICS???

 

[Tozu Fofo]

Anyone who is doing PHYSICS???

I am

 

[Tozu Fofo]

Anyone who is doing PHYSICS???

Here is a useful link to help you with your physics exam: https://www.xtremepapers.com/community/threads/please-check-this-link-d.41246/#post-922003

 

[Tozu Fofo]

Anyone who is doing PHYSICS???

I have also classified past papers for physics and equations and a lot of stuff, but I can't upload them because of security error
Can someone help??

 

[shingiechingz@8]

help please

 

[shingiechingz@8]

How can l describe
1. reflection
2.refraction
3.diffraction
Using wave theory!!!!!!!!

 

[shingiechingz@8]

 

[DANISH182]

Anyone who is doing PHYSICS???

me hard one but its easy if we use common sense

 

[qwertypoiu]

View attachment 53890

Is it D?

 

[Shandana khan]

Anyone who is doing PHYSICS???

I am too!

 

[Abdurrahmanmuhammed]

hey in 32 it says what will happen to ethanol in presence of oxygen??

did they ask any question like that ? :O

 

[Abdurrahmanmuhammed]

What was that reversible reaction of Copper chloride of blue and pink in paper 11? I know it turns back to pink, but does temperature increase or decrease in the reverse reaction?

temperature will increase as it exothermic

 

[Abdurrahmanmuhammed]

i wrote that it decreases as it released steam when heated which turned it from pink to blue

it increases .. they asked for reverse
so it was already blue when water was added it turned pink and temp will increase as it is exothermic

 

[Abdurrahmanmuhammed]

Yessss...... It totally is!!!!
I bet they made a mistake !!!

whats the mistake ?

 

[Saad the Paki]

whats the mistake ?

The MS says compression is a region of low pressure and rarefaction is a region of high pressure
which is wrong

 

[sj0007]

whats the mistake ?

The compression is the high pressure region whereas in the ms it is written that compression is the low pressure region..................

 

[Abdurrahmanmuhammed]

The MS says compression is a region of low pressure and rarefaction is a region of high pressure
which is wrong

oh dint notice that

 

[Saad the Paki]

Someone help me solve part (c)...