Biology; Chemistry; Physics: Post your doubts here!

[Dukeofwin]

d as ke is constant whats the mark scheme answer

Spot on! @Muahmmed Zain Qasmi and you are right!

 

[bogus]

Spot on! @Muahmmed Zain Qasmi and you are right!

didnt get u

 

[syed1995]

I couldn't solve this, how did you get the answer?

Pretty simple .. using the principle of moment ..

15*(30+30)=900 To find the moment

to find weight ..
as moment equals 900 Divide the answer (900)/30 to get weight.

then DIVIDE weight by 10 to get the answer. <-- This is what i forgot to do.

 

[Dukeofwin]

didnt get u

Well all i said was that D is the correct answer which means you and Zain qasmi are correct!

 

[Dukeofwin]

Pretty simple .. using the principle of moment ..

15*(30+30)=900 To find the moment

to find weight ..
as moment equals 900 Divide the answer (900)/30 to get weight.

then DIVIDE weight by 10 to get the answer. <-- This is what i forgot to do.

Moment/30 to get weight!
Which formula is this?

 

[daredevil]

1) it acts as a magnifying glass to read the temperature
2)D
3) and 4)
1.parallax error
2. dun know

yup u're right!!

 

[syed1995]

Moment/30 to get weight!
Which formula is this?

Moment=Weight*Distance
900=Weight*30

 

[daredevil]

Does anyone happen to have Examiner tips for physics.... plz give them or the link to them as i cud not find them on either xtremepapers or cie.org....! hurryy....
thanks in advance

 

[bogus]

Does anyone happen to have Examiner tips for physics.... plz give them or the link to them as i cud not find them on either xtremepapers or cie.org....! hurryy....
thanks in advance

http://www.cambridgestudents.org.uk...iner_Tips_for_O_Level_Physics_5054_ FINAL.pdf

 

[syed1995]

http://www.cambridgestudents.org.uk...iner_Tips_for_O_Level_Physics_5054_ FINAL.pdf

 

[Dukeofwin]

Th

Moment=Weight*Distance
900=Weight*30

Thanks

 

[syed1995]

Th
Thanks

No problem .. moment is like the only chapter which i know well.

 

[bogus]

http://www.cambridgestudents.org.uk/subjectpages/physics/OLevelPhysics/Examiner_Tips_for_O_Level_Physics_5054_ FINAL.pdf

see the post above urs

 

[syed1995]

see the post above urs

beat me to it here as well! damn.

 

[Dukeofwin]

I'm worse in potential divider questions,
please explain it to me!
Anyone please!

 

[syed1995]

Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it

 

[Fallen316]

Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it

G.P.E = m*g*h
5.5*10^4 = 85*10*h
h = 64.7m

 

[Fallen316]

I'm worse in potential divider questions,
please explain it to me!
Anyone please!

just remember, V1 = (R1/R1+R2)*V
just apply it one way or the other and you will get the answer

 

[Dukeofwin]

Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it

I got stuck in the same question but Fallen316 helped me in it!
Since the energy is never lost Kinetic energy is converted to potential energy.(Told be Rimsa and Fallen316)
According to which the formula say Ep=massxGxHeight!
-You have energy 5.5x10^4
-you have mass 85kg
-and you have G= 10
There you have it Height is for the taking!

 

[Dukeofwin]

L

just remember, V1 = (R1/R1+R2)*V
just apply it one way or the other and you will get the answer

LOL!
Thanks!