Edexcel Physics IGCSE 1P Unofficial Mark Scheme 25th May 2016

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Reply 20

cornflakeexpert

Original post by amarjoshi99

Question on why refractive index doesnt have a unit, why there is not 0 value for it on the graph,

i said because neither sinC nor 1 have units but who knows physics is not my strong point

Reply 21

cornflakeexpert

Original post by george_c00per

Was the LDR at the top of the circuit or at the bottom? I put it at the bottom at first but changed it..

top i think, the one with arrows

Reply 22

username2324315

Original post by cornflakeexpert

top i think, the one with arrows

Phew thank god I changed it at the last minute, I had a feeling that the arrows meant light going to it. :colondollar:

Reply 23

igggy

for the coolant shielding q does anyone know what direction the lines went coz i remember what lines i drew but not what they went too

Reply 24

conradliebers

Original post by igggy

for the coolant shielding q does anyone know what direction the lines went coz i remember what lines i drew but not what they went too

Middle to middle.
Bottom to up.
Up to bottom.

You are very welcome.

Reply 25

igggy

Original post by conradliebers

Middle to middle.
Bottom to up.
Up to bottom.

You are very welcome.

thanks mate good to know i got one right :h:

Reply 26

Annaperdy

I'm pretty sure 12c was the other way around, it stated that white meant there was more UV so surely the snow absorbed it?

Reply 27

conradliebers

Original post by Annaperdy

I'm pretty sure 12c was the other way around, it stated that white meant there was more UV so surely the snow absorbed it?

No, I even looked it up after the exam. The reason there is a larger amount of UV that is viewed is because it is reflected hence is seen when the photograph was taken.

Reply 28

Castro300

Original post by Annaperdy

I'm pretty sure 12c was the other way around, it stated that white meant there was more UV so surely the snow absorbed it?

Same!, that was so confusing , apparently online it says snow is the best reflector, question was so misleading

Reply 29

ursulab

Wait how did u get that orbital speed answer

Reply 30

emobha

Predicted grade boundaries?

Reply 31

Fur3ya

Original post by ursulab

Wait how did u get that orbital speed answer

by using the formula on the front

Reply 32

AVishaa

For question 12 d) I put the camera was facing away from the sun.

would this still get a mark or not?

Reply 33

conradliebers

Original post by AVishaa

For question 12 d) I put the camera was facing away from the sun.

would this still get a mark or not?

Don't think so.

Reply 34

cornflakeexpert

Original post by emobha

Predicted grade boundaries?

low i hope

Reply 35

Job738338

and we have maths tommorow :bawling:

Reply 36

conradliebers

Original post by Job738338

and we have maths tommorow :bawling:

I feel lucky having done it last year. But then for Edexcel they gave us the hardest paper they have released so keep your hopes up.

Reply 37

aaljhfgahsj

Guys for the question about the speed of the train I got 8.48... So 8.5(3sf) but a lot of people are saying its 12... Which it could be, but correct me if I am wrong but the question wanted the velocity of the train..so v=square root of ke/halfxmass, and I'm pretty sure the ke was given in MJ (so times by 1mil), and when you do that it gives you my answer...so which one is correct, and if it is 12 can someone plz explain?