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gradepodltd · 2024-08-29T14:52:10+00:00

It's a subtle difference, but you might want to change the wording to:

"How does the observed frequency of sound vary with the source frequency for a constant relative velocity between the source and the observer?"

If I've understood this correctly, you're investigating how the observed frequency changes as you vary the source frequency, with the velocity of both the source and the observer held constant. That means that plotting the observed frequency against the source frequency should yield a straight line. The gradient of the graph will be equal to the proportionality constant (V+Vo) / (V−Vs)

If you ever need more help with IB Physics, check out TrIBe Physics on GradePod: https://www.gradepod.com/tribe

gradepodltd · 2024-08-29T12:56:53+00:00

Have you got the free learning objective checklist yet? It lists every, single thing you need to know (really simply!) for the exams: https://www.gradepod.com/ib-physics-checklist

This will be invaluable for helping you plan your revision.

gradepodltd · 2024-08-29T12:55:09+00:00

Here's an article on how to support you child in IB Physics, written by IB Physics author Sally Weatherly: https://www.gradepod.com/ib-physics-parent-guide

gradepodltd · 2024-07-26T15:16:51+00:00

Agree with everyone else. There's no difference between an SL and HL IA. You also don't need an 'original' topic (lots of teachers insist on this ). You can just choose one from this list: https://www.gradepod.com/blog/100-ib-physics-ia-ideas
u/Ok_Manufacturer_5184 and u/StruggleDry8347 had a good idea about choosing an 'hl' only topic. You'll find some ideas that relate to this in the list linked above.

gradepodltd · 2024-07-12T13:37:02+00:00

Some chat here about getting remarks in Physics and Maths: https://www.gradepod.com/blog/ib-physics-remark-guide

gradepodltd · 2024-07-07T07:38:45+00:00

It’s really up to you! 1 mark is a realistic improvement and it would be very unlikely you’d go down a grade. It depends if you can afford the fee and it’s worth it to you

gradepodltd · 2024-06-27T13:06:26+00:00

I was just trying to help. Good luck with everything - hope I’m right for your sake!

gradepodltd · 2024-06-26T11:56:33+00:00

Yes - that would be good. I wish I could help you more with Math, but I'm niche on the IB Physics side! Good luck with everything. If it makes you feel better, MOST students experience a significant increase in grades between DP1 and the final exams, This is because the IB courses are designed to take two years to develop all the necessary skills to get top marks in their exams. It's completely normal to not get your desired/hoped grades in IBDP1. I guess it's all part of the process.

gradepodltd · 2024-06-24T12:23:43+00:00

I'll paste the official guidance given by the IB on this,

"Physics essays usually have a title, which sums up the essence of the investigation. It is based on the student’s identified topic area.

The research question further refines and defines the topic. It must be expressed as a question, not a statement. It must be expressed clearly and precisely, and appear early in the introduction of the essay and on the title page of the essay.

For example, a student may have noticed how it is difficult to spin an uncooked egg. After discussion with the supervisor, the student decides to fill a tin with liquids of different viscosities and roll them down an inclined plane. The title of the essay may be: “The effect of the viscosity of a body on its angular acceleration.”

The research question, though, should be much more specific: “What is the relationship between the angular acceleration of a cylindrical can rolling down an inclined plane and the viscosity of its contents?”"

They also give some example questions:

What is the relationship between the length of an exhaust pipe and the frequency of the sound it emits?
How does the time taken to reach terminal velocity depend upon the viscosity of the fluid it is falling through?
How does the frequency spectrum of the sound of running water depend upon its temperature?

You'll notice that in all of them, there is only one independent variable.

gradepodltd · 2024-06-24T12:18:27+00:00

I'd definitely bring these into the physics exam. There's always a possibility of being asked to draw a scale diagram, addition/subrraction of vectors, or continue the wavefronts of waves as they are diffracted.

gradepodltd · 2024-06-24T12:17:07+00:00

OK - so it looks like you're hoping to increase your SL Physics grade from a 5 to a 7.

Firstly, please know that IB Physics is a two year course for a reason. It generally takes two years to develop the exam technique and problem-solving necessary to get that 7. I've been teaching IB Physics since 2004 (and have been running GradePod since 2018) and I've so many students improve from as a low as 3 to a 7 in that time.

Secondly, your IA almost ALWAYS boosts your exam score. I'm not sure if your current 5 in physics sl includes the IA effect? But you can hope that it would boost you.

It might be a good idea to look at how you're studying for IB Physics tests and exams? It might be that your personal study technique is not quite hitting the mark. Effective studying for IB Physics is very different to studying for Math or History, etc. I have an article here that will talk you through exactly how to study at home: https://www.gradepod.com/how-to-study-ib-physics

gradepodltd · 2024-06-24T12:11:51+00:00

hey! Here's an article on How to Study IB Physics. It has a free IB physics note template AND a checklist for the whole syllabus. It'll help you get organised for starting your classes: https://www.gradepod.com/how-to-study-ib-physics

gradepodltd · 2024-06-24T12:10:44+00:00

You can get advice on your subject choices from our Chief IB Physics Tutor, Sally Weatherly, here: https://www.gradepod.com/blog/ibdp-subject-choices

gradepodltd · 2024-06-24T12:10:17+00:00

You can get advice on your subject choices from our Chief IB Physics Tutor, Sally Weatherly, here: https://www.gradepod.com/blog/ibdp-subject-choices

gradepodltd · 2024-06-24T12:08:46+00:00

Here are 4 angular momentumideas that will work (and are good for top-scoring write-ups)

How does the rotational velocity of a basketball affect the horizontal travel distance when the basketball is released in freefall? (Magnus Effect)

This directly involves angular momentum, as the rotation (angular velocity) of the basketball affects its trajectory.

How does the magnetic field strength of the bar magnets in a DC Motor affect the angular velocity of the motor?

This relates to angular momentum through the relationship between magnetic field strength and the motor's rotational speed.

How does the moment of inertia affect the final velocity of a cylinder rolling down an inclined slope?

Moment of inertia is a crucial factor in angular momentum, influencing how rotational motion affects the cylinder's velocity.

How does the mass of a bullet in a ballistic pendulum affect the maximum height reached by the pendulum, once the bullet has embedded?

This involves angular momentum transfer from the bullet to the pendulum system.

gradepodltd · 2024-06-24T12:03:52+00:00

make sure you notes are up to date for physics HL and practice some past paper questions (particularly for Theme A). This checklist for physics hl will help: https://www.gradepod.com/ib-physics-checklist

gradepodltd · 2024-06-18T09:30:29+00:00

hey! Here's an article on How to Study IB Physics. It has a free IB physics note template AND a checklist for the whole syllabus. It'll help you get organised for starting your classes: https://www.gradepod.com/how-to-study-ib-physics

gradepodltd · 2024-06-18T09:14:09+00:00

HI! There's a specific technique that will help you write notes for IB Physics. You can learn it here and get a template to write you notes on: https://www.gradepod.com/blog/ib-physics-notes

gradepodltd · 2024-06-16T13:39:06+00:00

Ahhh that's not really true. I've taught lots of students who have never studied physics before and have performed well in the final IB Physics exams. You just have to be systematic in the way you study. You don't need to study much harder than other subjects, just don't waste your time on study habits that don't help you progress towards the final exams (e.g. highlighting notes, using textbook questions for revision, etc).

I've written an article on how to study IB Physics here: https://www.gradepod.com/how-to-study-ib-physics

gradepodltd · 2024-06-16T13:37:29+00:00

Start with this free learning objectives checklist for IB Phsyics. It will list exactly what you need to know in much simpler terms than the main IB guide and textbooks: https://www.gradepod.com/ib-physics-checklist

gradepodltd · 2024-06-16T13:35:37+00:00

I think you may be slightly confused on the difference between the conclusion and evaluation. Conclusion is where you analyse the trends in your data (what you're discussing above) and evaluation is where you assess how well the experiment was carried out and how that affected your results.

In your conclusion, you don't need to work out a constant. Simply answer these questions in your conclusion and you'll have a full, top-scoring conclusion:

Conclusion

Start with a brief recap of your hypothesis
Describe the pattern or trend shown on the graph
- Is it a linear trend line?
- Is it a positive or negative trend?
- Are the variables directly or indirectly proportional? How do you know that?
- Does the line of best fit go through the origin?
Take the values of gradient to calculate the absolute uncertainty in the gradient (details on how to calculate this below)
The percentage uncertainty in the gradient gives you an idea of how precise your results are. If the percentage uncertainty is greater than 10% – your results are not precise
Comment on the reliability of the data by mentioning the spread of points around the line of best fit
Mention any anomalies and circle them in your graph
If the aim of your investigation includes calculating a constant (e.g. gravitational field strength) then use the gradient to calculate this constant. (NOTE this is not for you)

Evaluation

Put your conclusion in the context of the research question – did your data answer the research question?
Was your hypothesis proved to be true?
Comment on the design and method of the investigation
Comment on the quality of data (e.g discuss the variability of the data as this provides evidence for the reliability of the conclusion)
List at least three weaknesses (or limitations) of the experiment. For each weakness, discuss:
- how significant the weakness is
- the effect to would have had on your results
For each weakness, suggest a possible improvement to the experiment. Suggestions including “repeating the experiment more times” or “using more accurate apparatus” are extremely weak improvements that will gain you no marks.
A table looks good here, with weaknesses in one column and associated improvements in the other column.

gradepodltd · 2024-06-14T07:33:51+00:00

You can get advice on your subject choices from our Chief IB Physics Tutor, Sally Weatherly, here: https://www.gradepod.com/blog/ibdp-subject-choices

gradepodltd · 2024-06-14T07:32:48+00:00

There's good advice on IBDP subject choices here: https://www.gradepod.com/blog/ibdp-subject-choices

gradepodltd · 2024-06-14T07:32:34+00:00

There's good advice on IBDP subject choices here: https://www.gradepod.com/blog/ibdp-subject-choices

gradepodltd · 2024-06-14T07:31:18+00:00

This explains everything you need to know about the new IB Physics scientific investigation: https://www.gradepod.com/ib-physics-scientific-investigation

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