Physics: Post your doubts here!

[hellodjfos;s'ff]

Thanks brada

 

[Fardeen3342]

do you have feb march 2018 for chem p4 and physics p5 please post it

 

[angryrider_56]

do you have feb march 2018 for chem p4 and physics p5 please post it

nah fam...i dont take chem so i didnt really search for it but if i encounter it, ill send asap.

 

[Fardeen3342]

nah fam...i dont take chem so i didnt really search for it but if i encounter it, ill send asap.

thank you so much

 

[GarryTheGhost]

can anyone please show me a simple circuit on how i would measure the intensity of the sound wave reflected back, i tried to draw this but in 10 min but i dont know if this is right or wrong.

 

[Sijanshrestha]

Any prediction for tomorrow's paper 52???

 

[Holmes]

do you have feb march 2018 for chem p4 and physics p5 please post it

https://drive.google.com/drive/folders/1-A53teIm6qZVmW9xnU9l1FMUvUqcgirH
here it is

 

[xoxoxoxo123276]

Does anyone have the feb March 2018 for physics 9702 p22?

 

[xoxoxoxo123276]

The link isn't working can you send for google drive?

 

[Kanekii]

Can someone help me in Q2 part 5 of this paper m/18 phy 22
Thanks

 

[Ebrahim12]

Can someone help me in Q2 part 5 of this paper m/18 phy 22
Thanks

Δp = p2 - p
Rearranging gives:

Δp + p1 = p2

We know from the diagram the angle between p1 and p2.

The vector diagram:

You can use Pythagoras's theorem to find Δp.

 

[Kanekii]

Δp = p2 - p
Rearrange gives:

Δp + p1 = p2

We know from the diagram the angle between p1 and p2.

The vector diagram:
View attachment 63599
You can use Pythagoras's theorem to find Δp.

Oh i see now tsym

 

[Jihoo Lee]

Anyone can tell me the s.fs of paper 2?? 2 or 3 s.fs? ;( and good luck on your tmr's exam!

 

[Krypton36]

Any prediction for tomorrow's paper 52???

I guess it’ll be something from magnetism!

 

[GarryTheGhost]

I guess it’ll be something from magnetism!

what makes you think that?

 

[Kanekii]

Anyone can tell me the s.fs of paper 2?? 2 or 3 s.fs? ;( and good luck on your tmr's exam!

Its usually 3 but its always stated at the front page of the the exam under instructions. Also for some questions they specify how many significant figures

 

[Sijanshrestha]

Hello, can anyone please help me with the figure of question no. 1 of paper 52 of Feb/March 2018????

 

[Sijanshrestha]

I guess it’ll be something from magnetism!

How did you know that?

 

[Ebrahim12]

Anyone can tell me the s.fs of paper 2?? 2 or 3 s.fs? ;( and good luck on your tmr's exam!

In the final answer you should use the same number of sigfigs as the value with the smallest number of sigfigs in your calculation.

Example:

m = 1.90 kg (3sf)
v = 2.3 ms^-1 (2sf)

The kinetic energy here should have 2sf.

 

[Jihoo Lee]

In the final answer you should use the same number of sigfigs as the value with the smallest number of sigfigs in your calculation.

Example:

m = 1.90 kg (3sf)
v = 2.3 ms^-1 (2sf)

The kinetic energy here should have 2sf.

Got it. if the previous question is "show that~", should I use that value in the question or the value I calculated in more s.f ?