# Unit 4 ial physics 20 may 2019Watch

#1
Old specification.guys any exam predictions?for this 2019 unit 4 ial physics
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1 month ago
#2
it's all about luck, im so scared
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#3
same
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#4
how many past papers have u completed
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1 month ago
#5
(Original post by Fathima marzs)
how many past papers have u completed
4 papers. but then again, ive never studied much my whole life
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1 month ago
#6
How’d everyone find it. I thought it was quite easy.
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1 month ago
#7
What’d everyone get the momentum of the charged sphere?
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1 month ago
#8
I think it was something around 4.1 × 10^-4 kgm/s
Last edited by GeorgeTD; 1 month ago
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1 month ago
#9
Guys what was the answer for the 4 electrons being produced question?
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1 month ago
#10
False Statement.
The main points that prove it wrong: Curvature/Path in diiferent directions meaning they do not have the same charge (obviously electrons have the same charge). Different radius of curvature for each spiral shows difference in initial K.E/Momentum and also Mass.
So clearly the 4 decay products are not of the same nature when it comes to mass/charge.
(Original post by Xoana200)
Guys what was the answer for the 4 electrons being produced question?
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1 month ago
#11
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1 month ago
#12
what was the answer to using the p.d time graph to show it used a capacitor?
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1 month ago
#13
How did u guys show the 10nF
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1 month ago
#14
I think it was revolved around tbe idea that P.D drops/decreases exponentially ovet time. Meaning a capacitor was used to store charge and then discharge gradually through the resistor.
(Original post by alevel1232)
what was the answer to using the p.d time graph to show it used a capacitor?
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1 month ago
#15
(Original post by NNC123)
How did u guys show the 10nF
just picked a point on p.d graph then used discharge equation to get like 1.37 x10^-8 which rounds to 10 nF
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1 month ago
#16
Guys what was the answer for question no. 12
The question was of 6 marks with an asterisk mark.
Was it about Rutherfords obsv. And conclusions?
Or it was something else.
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1 month ago
#17
Thanks for the reply. Got the same answer, was confused at the spot.
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1 month ago
#18
Its protons neutrons and electrons that make up atoms which is what makes matter of statues. Proton is uud, neutron is udd, electron is the only lepton. Atom is mostly empty space neutron and protons are concentrated in nucleus.

(Original post by NNC123)
Guys what was the answer for question no. 12
The question was of 6 marks with an asterisk mark.
Was it about Rutherfords obsv. And conclusions?
Or it was something else.
0
1 month ago
#19
ok g thats what i wrote
(Original post by GeorgeTD)
I think it was revolved around tbe idea that P.D drops/decreases exponentially ovet time. Meaning a capacitor was used to store charge and then discharge gradually through the resistor.
0
1 month ago
#20
How did u guys do the 11 th number question.
Did u guys add the given diameter 12 cm with 5cm above surface? And did we have to multiply 2 with the charge?
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