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Physics IAL (WPH11) Unit 1 January 2020 Discussion

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What do you guys think the grade boundaries would be?
Original post by Itzyaboi529
What do you guys think the grade boundaries would be?

Should be atleast 48 for A
U will compare both sample A will store little energy doesn’t deform plastically a small stress causes a large strain yet sample B has a high tensile stregnth can store a lot of energy so can expand without breaking i seas that it also endures a very high stress
Original post by Porshi
For glue it goes through plastic deformation stores more energy night youngm isn’t brittle

You sure. Not about high young modulus high stress etc
Original post by Faazusman
It wasn't as hard compared to June and October 2019.I finished on time. What did you get as velocity of steam? I That question confused me.

İ found 3.4
Original post by Ryan1104
I found it using e=f x/A ◇x

how ? He gave u the original length i couldnt use all infos i calculated the area in the previous question yet i stoped and one piint
how many marks was the popcorn kernal velocity question?
Original post by Selin2003
İ found 3.4

Yeah me too the distance was around 6.3 which was around 12.6 cm in reality and we had the time but in mili seconds
Original post by Itzyaboi529
how many marks was the popcorn kernal velocity question?

4 marks.I found 3.36 what about you
Reply 29
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Original post by Ryan1104
How did you find the young modulus

Gradient * 9.81 = K constant
then finally
K*(Lenth/Area)
Reply 30
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Original post by Itzyaboi529
how many marks was the popcorn kernal velocity question?

4 or 5 marks
Original post by Selin2003
4 marks.I found 3.36 what about you

yea i got 3.4
Original post by Itzyaboi529
yea i got 3.4

What was the Mass of the ball in 19 th question
Reply 33
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Original post by Itzyaboi529
yea i got 3.4

Yep same
Working was
Find mass of corn
find mass of water
find mass of popped corn
calculate total enrgy of un popped
subtract with kintetic energy of popped corn
then remaining kinetic energy is equivalent to kinetic energy of the water
then substitute for Velocity
Wow this is some long aSS working shEESh
What was the mass of the ball in the 19 th question
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Original post by Selin2003
What was the Mass of the ball in 19 th question

i got 0. soemthing
Original post by Alex Who?
i got 0. soemthing

I found it 0.3 kg
How much was a distance for a pop corn?
Original post by Selin2003
I found it 0.3 kg

yea same
Reply 39
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Original post by Selin2003
I found it 0.3 kg

OO yes yes i think i got that

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