- Messages
- 21
- Reaction score
- 2
- Points
- 13
Is it possible to study A2 Physics without AS physics knowledge? Is A2 Physics very much related to AS Physics? Need answers frm u guys quickly。It's urgent!!!Ｔｈａｎｋｓ
-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
A2 Physics | Post your doubts here
- Thread starter ambitious1
- Start date
- Messages
- 1,476
- Reaction score
- 1,893
- Points
- 173
No, i dont think so, why do you want to do it?
Not all topics are related but some are!
You can do it but cannot be sure to have your concepts cleared!
- Messages
- 260
- Reaction score
- 104
- Points
- 53
Guys I have a doubt in the telecommunication chapter. When concerned with signal attenuation and noise calculations always involve the unit decibel (dB), and there is one question asking why use the decibel as unit. I have no idea at all with this question. 
Can anyone explain to me the point? Thanks a lot.
Can anyone explain to me the point? Thanks a lot.
- Messages
- 1,476
- Reaction score
- 1,893
- Points
- 173
Isn't Physics over with ?Guys I have a doubt in the telecommunication chapter. When concerned with signal attenuation and noise calculations always involve the unit decibel (dB), and there is one question asking why use the decibel as unit. I have no idea at all with this question.
- Messages
- 260
- Reaction score
- 104
- Points
- 53
I'm sorry?
- Messages
- 1,476
- Reaction score
- 1,893
- Points
- 173
Physics p4 is over, right ?
Anyway, its because the values involved are very large to be handled!
So logs are used and that is why a new unit bel is used!
1 decibel = 10 bels
- Messages
- 260
- Reaction score
- 104
- Points
- 53
Okay I get it. Thanks.
Physics P4 is over but I still need to get clear some points. It's not just for the exams, right?
- Messages
- 1,476
- Reaction score
- 1,893
- Points
- 173
Right, but better to focus on other exams, huh ?Okay I get it. Thanks.
Physics P4 is over but I still need to get clear some points. It's not just for the exams, right?
- Messages
- 265
- Reaction score
- 89
- Points
- 28
Drowning in paper 5... Starting to study for it today for the first time !!! :S
No clue how to prepare for it or how to solve the questions... ugh..
No clue how to prepare for it or how to solve the questions... ugh..
- Messages
- 280
- Reaction score
- 173
- Points
- 53
physics p5 are kinda easy...
- Messages
- 265
- Reaction score
- 89
- Points
- 28
Then please share the exact steps you used to properly prepare for this paper from the very beginning.
I just feel its kinda time-consuming to know all the experiments possible so that we can explain the procedure...
- Messages
- 280
- Reaction score
- 173
- Points
- 53
For question two..
you have to draw two lines . One the best fit line and second the worst acceptable line. The worst acceptable line is the line from the lowest error of first point to the highest error point of last point or vice versa.
To calculate uncertainty in gradient = Gradient of Best fit line - Gradient of worst acceptable line
and to calculate the uncertainty in y-intercept = y-intercept of Best fit - y-intercept of worst acceptable line.
If you have to find a value using gradient and then you are asked to find uncertainty in it then :
e.g gradient = p/v and have to find p
you will find p using gradient of best fit line and then find a second value of p using the gradient of worst acceptable line
so the uncertainty in p is= first value of p - second value of p.
- Messages
- 265
- Reaction score
- 89
- Points
- 28
awesome, seems I understand question two properly then. Thanks
But then I guess my problem is with question one. Too many experiments to learn. Cant believe we have to learn soo many experiments.
If you have any steps for me to follow to learn Question one, or shed light on the steps you used to study. That will be helpful.
Thank you for your time
Much Appreciated
- Messages
- 280
- Reaction score
- 173
- Points
- 53
awesome, seems I understand question two properly then. Thanks
But then I guess my problem is with question one. Too many experiments to learn. Cant believe we have to learn soo many experiments.
If you have any steps for me to follow to learn Question one, or shed light on the steps you used to study. That will be helpful.
Thank you for your time
Np.. and i dont know how to prepare for vhem p5..for question one you have to give these points:
1.Defining the problem
tell which thing is dependent variable and which one is independent variable . 2 marks for this. and 1 mark is for stating any other variable that must be controlled.
2. Methods of data collection.
like how will you vary the variables and how will you measure the values etc 5 marks are for this . one mark is for diagram. do mention what instruments you are using.
3. Method of analysis.
define the given equation.
plot a graph and justify the given relationship. you dont have to plot a graph . you just write that a graph is plotted e.g equation is v=k^2
apply ln we get ln v = lnk + 2lnr
compare it with y=mx + c we see that the given equation is a straight line. so a graph of lnr against ln y is plotted and gradient will be 2.
2 marks are for this.
4. Safety considrationL
write any valid safety consideration. do learn the answers of last part of q2 from p3s. they will help you in this.
4. additional information.
for this also see the answers of last part of p3 q2.
- Messages
- 265
- Reaction score
- 89
- Points
- 28
Ok now I know the tips, but how did you know all the experiments? Do you have link or website ?
Ppaper 5 Tips Question 1
I am pretty sure that you did not ONLY study those tips? I need a compleete study guide on paper 5 especially on the experiment in Question 1.
How can I know all the possible experiments for each situation????? Im really confused!! There must be a shorter way.
Thanks!
- Messages
- 505
- Reaction score
- 739
- Points
- 103
aoa wr wb!
well i never actually studied any experiment for that :s
what i do is...read the question...think of what can be done..write that....divide ur answer into portions....
the one how they mark...5 portions....dont have time so cant go any further..i hope u get what i mean
- Messages
- 1,476
- Reaction score
- 1,893
- Points
- 173
Physics P5 is way easier compared to chem P5
Plz pray that it goes well for all of us!
Plz pray that it goes well for all of us!
- Messages
- 280
- Reaction score
- 173
- Points
- 53
i never studied any experiment.. most of the experiments in question 1 are very similar to AS practicals. so , i kinda know what need to be done. Plus , as user said that read the question and think and then divide to fulfil the requirements.
- Messages
- 505
- Reaction score
- 739
- Points
- 103
yup dividing things is the best thing...makes it a lot easier..
Defining the problem
3 marks
Methods of data collection
5 marks
Method of analysis
2 marks
Safety considerations
1 mark
Additional detail
4 marks
if in the method part u really give detailed answer like reason to evry step ....and how to make it accurate u'd get those 4 marks in the end...!
Defining the problem
3 marks
Methods of data collection
5 marks
Method of analysis
2 marks
Safety considerations
1 mark
Additional detail
4 marks
if in the method part u really give detailed answer like reason to evry step ....and how to make it accurate u'd get those 4 marks in the end...!
- Messages
- 265
- Reaction score
- 89
- Points
- 28
omg, you guys make it look soo easy! Man I must suck badly. Sometimes I dont know what can be done to investigate the problem, so I would prolly lose alot in method of data collection...
Man I am really like stuck here, I dont know what Im doing is right. Cz I am looking for all sorts of experiments from Chapter 1... and alot of them I hear for the first time.
This is hopeless, im feeling its really hard to study for the experiments but you guys say that you dont need to. I am soo desperate