Physics, Chemistry and Biology: Post your doubts here!

[skyangel]

people how to calculate the rate of photosynthesis in light intensity experiment

 

[My Name]

Thanks............. again!!

Welcome again

 

[DANISH182]

PLZ HELP REALLY CONFUSED CAN ANYBODY HELP ME IN THE QUESTION 2(B) IN (0625/32/O/N/10)

 

[DANISH182]

I NEED HELP URGENTLY I HAVE MY BOARD EXAMS NEXT WEEK

 

[DANISH182]

CAN ANYONE PLZ

 

[sj0007]

where in KSA are u from?

Ummm....... Dammam................ why? R u from KSA too?

 

[DANISH182]

NO ONE CAN HELP

 

[The Sarcastic Retard]

PLZ HELP REALLY CONFUSED CAN ANYBODY HELP ME IN THE QUESTION 2(B) IN (0625/32/O/N/10)View attachment 52724

a) PE = mgh = 0.15 * 10 * 0.3 = 0.45J
bi) PE lost = KE gain = mgh = 0.15 * 10 * 0.1 = 0.15J

 

[Mustafa84922]

GUYS I NEED YOUR HELP
THOSE WHO ARE GOOD IN PHYSICS PLS TAKE A LOOK AT QUESTION 7 (b) (i) of paper 31 winter 2014
the mark scheme shows that the answer is 48 but when i do it the answer is 50 and i dont quite understand the step in the ms

 

[skyangel]

I have asked so many question and no one reply s

 

[skyangel]

GUYS I NEED YOUR HELP
THOSE WHO ARE GOOD IN PHYSICS PLS TAKE A LOOK AT QUESTION 7 (b) (i) of paper 31 winter 2014
the mark scheme shows that the answer is 48 but when i do it the answer is 50 and i dont quite understand the step in the ms

The part i ans is to make molecules similar to gas ok
The second part ans is there are least forcoes of attraction between molecules in gas so de move freely the solid molecules have strong forces of attraction due to which they strongly packed

 

[DANISH182]

I UNDERSTAND ALL OTHER THINGS BUT WHY 0.1 IN B

a) PE = mgh = 0.15 * 10 * 0.3 = 0.45J
bi) PE lost = KE gain = mgh = 0.15 * 10 * 0.1 = 0.15J

 

[DANISH182]

I CHECKED IT OUT IN THE MARKING SCHEME BUT I DONT UNDERSTAND THE CONCEPT

 

[My Name]

I have asked so many question and no one reply s

Where?
Post em here.I'll try to help.

 

[The Sarcastic Retard]

I UNDERSTAND ALL OTHER THINGS BUT WHY 0.1 IN B

As we are considering "g" we should take 0.1 as its vertical height and g is only considered when we are dealing vertical motion.

 

[igcseissoon]

Hey, I have my alternative to practical exam in 4 days. I am hoping that someone can help me out with some notes

Thanks

 

[sfhn_128]

Hey, I have my alternative to practical exam in 4 days. I am hoping that someone can help me out with some notes

Thanks

R u talking about physics?

 

[igcseissoon]

Actually all three
double award

 

[sfhn_128]

Actually all three
double award

oh ok...........
For physics: https://www.xtremepapers.com/community/threads/amazing-notes-for-physics-paper-6.16788/
http://znotes.byethost17.com/ <- This link contains everything!!
Best of luck!!...........Remember me in your prayers!

 

[OneOfAKind]

Can any of you guys hook me up with a chart or a table of colors of metals and their oxides? I have come across a lot of questions regarding color of metal oxides in pp6
Thanks in advance