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100 Interesting Physics Topics For Research Paper In 2022

physics topics

Searching for a topic in physics can be one of the more difficult challenges for students at any level. Teachers and professors want their students to research and write something original. They also want students to challenge themselves by pushing the envelope and studying new areas in the field. This can be overwhelming for students and trying to come up with even a handful of physics topics might seem an impossible task.

Choosing Physics Topics For a Project

A good physics research topic should be broad enough to let you find plenty of material to answer all of the important questions. It should, however, also be narrow enough to fit within the parameters of your assignment. We can help you with that. Check out our list of physics topics that cover a wide range of areas within the field:

Physics Research Paper Topics for High School

More Topics in Physics High School

Five Cool Physics Topics to Do Quickly

Physics Research Topics for College

Physics Topics for Paper Graduate School

Special Topics in Calamity Physics

Physics IA Topics Ideas for Studying

Interesting Physics Topics for All

AP Physics Topics for High School

SAT Physics Topics Ideas for Studying

Physics GRE Topics for Studying

MCAT Physics Topics Ideas for Studying

Five Fun Physics Topics to Do Quickly

Theoretical Physics Topics for Undergraduates

Interesting Modern Physics Topics

Great Physics Topics for Presentation

Physics Regents Topics for Preparation

Great Physics Paper Topics for a Short Project

Good Physics Projects Topics for a Long Project

Physics Essay Topics Related to Everyday Situations

Physics is really hard. We understand this and have committed ourselves to assist students at all levels and dealing with all situations. Our experts have put together these physics topics to help students save some time. We can also help develop custom physics science topics to fit any assignment requirements.

Just give us a call, email us, or send us a message by chat. Our customer service team representatives are available to help with any physics project topics you need. An excellent custom thesis is not a problem for us. We’ll connect you with the most qualified experts and will lighten the burden of the most difficult assignments.

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physics paper 3 topics

Paper 3 is the same format as paper 2 but the questions are on the options. Refer to the section on paper 2 for comments on the type of question and marking as it is the same.The paper is split into 2 sections:Section 1 is a data analysis question plus some short questions related to the required practicals. This section is the same for both HL and SLSection 2 consists of 4 questionsA Relativity B Engineering C Imaging...

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A List of 240 Physics Topics & Questions to Research

Plates break when you drop them. Glasses help you see better. Have you ever wondered why?

Our specialists will write a custom essay on any topic for $13.00 $10.40/page

Physics has the answer. It studies the observable as well as invisible aspects of nature. An essential part of this is examining the structure and interactions of matter.

Are you a high-schooler studying for your exams? Or maybe you need to write an interesting physics paper for your Ph.D. research or college seminar? This article presents a list of the most popular topics in physics for you to choose from.

Best of all, you don’t have to push yourself too hard to finish your essay. Custom-writing.org is happy to help students with all kinds of written assignments.

🔝 Top 10 Physics Research Topics

✅ branches of physics.

🔍 References

Now: before writing about physics you should know about its main branches. These are classical and modern . Let’s take a closer look:

Spacetime.

You can talk about any of these branches in your essay. Keep in mind that this division is a basic outline. Strictly speaking, everything that happens around you is physics! Now, we’re all set to move on to our physics paper topics.

⭐ Top 10 Physics Topics 2023

🧲 Classical Physics Topics to Write About

Classical physics deals with energy, force, and motion. You encounter this kind of physics in everyday life. Below, we’ve compiled a list with compelling prompts you’ll recognize from your physics class:

⚙️ Mechanics Essay Topics

🌡️ Thermodynamics Paper Topics

Entropy.

⚡ Electromagnetism Topics to Research

🔊 Essay Topics on Sounds & Waves

👓 Optics Topics to Write About

☢️ Modern Physics Topics for a Paper

The world of modern physics shifts away from its more tangible origins. It deals with atoms and even smaller particles. Nuclear, atomic, and quantum physics belong to this category. One of the central problems of modern physics is redefining the concept of gravity.

Werner Heisenberg quote.

🔋 Physics Project Topics for a Science Fair

What’s the most fun part of every natural science? If you said “experiments,” you guessed it! Everybody can enjoy creating rainbows or exploring the effects of magnets. Your next physics project will be as fascinating as you want it to be with these exciting ideas!

🔭 Astrophysics Topics for a Research Paper

Astrophysicists, astronomers, and cosmologists observe what happens in space. Astronomy examines celestial bodies, while astrophysics describes their mechanics. At the same time, cosmology attempts to comprehend the universe as a whole.

Spectral types of stars.

🌎 Physical Geography Topics to Write About

Physical geographers explore the beauty of our Earth. Their physical knowledge helps them explain how nature works. What causes climate change? Where do our seasons come from? What happens in the ocean? These are the questions physical geographers seek to answer.

Receive a plagiarism-free paper tailored to your instructions.

🤔 Theoretical Physics Topics to Research

Math fans, this section is for you. Theoretical physics is all about equations. Research in this area goes into the development of mathematical and computer models. Plus, theoretical physicists try to construct theories for phenomena that currently can’t be explained experimentally.

The six types of quarks.

⚛️ Quantum Physics Topics for Essays & Papers

First and foremost, quantum physics is very confusing. In quantum physics, an object is not just in a specific place. It merely has the probability to be in one place or another. Light travels in particles, and matter can be a wave. Throw physics as you know it overboard. In this world, you can never be sure what and where things really are.

We hope you’ve found a great topic for your best physics paper. Good luck with your assignment!

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Physics HL paper 3 questions

Giannis

By Giannis , January 27, 2019 in Physics

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I have a question with two scales.

1. Our teacher said that the IB Physics Paper 3, includes questions that concern lab experiments. However, I did some research and I found that it concerns the options? Can someone confirm this? Is there even a Physics paper that concerns lab experiments? It's our teacher's first year doing the IB, so I don't exactly trust her.

2. I found this site online which has past papers:

https://freeexampapers.com/exam-papers/IB/Physics/Higher/2015-May/

Here, if I click on "Paper 3", it only has options E, F, G, H, I and J. Where are options A, B, C and D? Me and my class have chosen option B - Engineering. But it doesn't seem to be here.

Am I getting something wrong here?

Thanks in advance!

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kw0573

kw0573 1,261

You should look for the most recent "IB guides" on all your subjects. For physics, it is 2016. 

In 2016, paper 3 will consist of data processing questions and those based on your option. Attached below are the specimen papers IB published for the current syllabus. 

Thanks

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Discover a Better Way to Study for the May 23 IB Physics Exams - Free Revision Class! SIGN UP HERE!

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IB Physics Exam Breakdown of Exam Content [UPDATED for 2023-24]

Ib physics exam breakdown (2023-24), stop inefficient revision now for your ib physics exams, shocking fact not all topics in ib physics are represented equally in the final exams and you must be strategic to maximise marks and minimise effort..

If your aim is to get good marks in your IB Physics exams then you need to study strategically. This means you should have a ‘plan of action’ for your exam revision. This plan should be based on evidence and calculated hunches. I'll walk you through a detailed plan below.

NOTE: In the video above (highly recommended...!) I mention the IB Physics: Starter Study Kit - you can download that here if you want free kit.

I get it.  You don’t have the time or resources to build out a ‘plan of action’ based on evidence and calculated hunches. What does that even mean??

Good news.  I’ve got time.

Great news! I’ve built out a ‘plan of action’ and revision strategy for you and it starts with prioritising the most heavily examined concepts (see below!). The 13 minute video above will help.

Prioritise These Topics (If  You're  Taking IB Exams in 2023-24)

Revert to “normal”.

The IB exams in 2023-24 will revert to the format pre-Covid. This means they will revert back to 'normal' exams with assessment of Paper 3 (Option Topic) and Group 4 project.

The first part of our ‘plan of action’ is to focus on longer term revision. Let’s focus on the weeks and months before the exams.

You should know that all topics are not examined equally in the exam - some are more heavily-weighted than others.

The graphs below show the average percentage that each topic in IB Physics makes up of your final IB mark.  

STANDARD LEVEL

This means that if you are a Standard Level student and only ever studied Topic 2: Mechanics then you could achieve a whopping 14% in your final IB Physics exam! That’s without ever touching an internal assessment or option topic! Now.... you and I  both  know that you are not going to adopt that strategy. However, it’s certainly worth spending more time on Topic 2 than Topic 6.

The first part of your strategic ‘plan of action’ is to revise the Standard Level topics in the following order:

HIGHER LEVEL

For a Higher Level student, it’s tempting to forget about Topic 6 altogether - isn’t it? You certainly don’t want to spend weeks revising Topic 6: Circular Motion and Gravitation for the sake of 1% in your final IB Physics mark...

The first part of your strategic ‘plan of action’ is to revise the Higher Level topics in the following order:

Recommendations

Strategies for Paper 1

At the end of your two year course, you will sit three papers for IB Physics. Each paper has its own quirks and trends that we can use to revise strategically using our ‘plan of action’. This will allow you to maximise your marks and prevent you from wasting time on inefficient revision in your short term revision (i.e. days/weeks before exams).

FACTS about Paper 1:

Heavily Examined Topics in  SL Paper 1 :

Heavily Examined Topics in  HL Paper 1 :

Top Tip! There is usually only ONE mark available to Topic 1 (Measurement and Uncertainties) in Paper 1. Don’t bother revising Topic 1 too much when preparing for Paper 1.

ADVICE for Paper 1

Strategies for Paper 2

Many IB Physics students have had nightmares about Paper 2. Let’s break it down and see if we can be strategic about how to prepare for Paper 2 in the shorter term (i.e. the weeks and days before the exam)

FACTS about Paper 2:

Heavily Examined Topics in  SL Paper 2 :

Heavily Examined Topics in  HL Paper 2 :

Top Tip! It is likely that there will be no questions on Topic 1 (Measurements and Uncertainties) in Paper 2.

ADVICE for Paper 2

Strategies for Paper 3

Paper 3 is often examined the day after Paper 1 & 2. Students usually find it to be a welcome relief from the exertions of the previous day. I can help make it even easier for you...

FACTS about Paper 3:

Breakdown of  SL Paper 3 : Section A - It is only 15 marks - Worth 9% of your final IB Physics mark - All about Topic 1 (Measurements and Uncertainties) and the list of required practicals given by the IB (see Strategy 3).

Section B - It is only 20 marks - Worth 11% of your final IB Physics mark - All about your chosen Option Topic

Breakdown of  HL Paper 3 : Section A - It is only 15 marks - Worth 7% of your final IB Physics mark - All about Topic 1 (Measurements and Uncertainties) and the list of required practicals given by the IB.

Section B - It is only 30 marks - Worth 13% of your final IB Physics mark - All about your chosen Option Topic

ADVICE for Paper 3

Use the night before the exam to: • Memorise definitions from Topic 1 and your option topic • Read through all the practicals you have done in class • Read through your revision notes for Topic 1 and your Option Topic. Click here if you’d like to learn how to write effective revision notes QUICKLY

Start being strategic in your revision and you’ll be more efficient and effective in your results. In the months and weeks before the exams, prioritise the most heavily examined topics. You’ll want to make effective revision notes on these topics and practice exam-style questions, split by topic.

In the weeks preceding the exams, your study strategy will alter slightly, depending on the intricacies of each paper. Past papers will become a focus of revision and the most heavily examined topics will change.

physics paper 3 topics

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50 physics topics: read and start writing today.

physics topics

Are you spending hours on end looking for exceptional physics topics to write your essays on? If this is the case, you are one of the thousands of students who are trying to do everything themselves. But did you notice that many of your peers don’t seem to be struggling much to come up with excellent physics topics? How do they do it? The answer is simple: they are getting help.

Finding the best topics in physics may not be easy for students, but it is definitely relatively simple for experienced academic writers . But don’t worry, you don’t need to pay for interesting physics topics. We have a list of 50 unique topics that you can use for free – right now!

Here Is Why You Need Our Physics Topics

From physics project topics to physics research paper topics, we have them all. But why do you need them? In simple terms, you need excellent topics if you want to get top grades. The topics in physics high school students appreciate are the ones that can help them raise their GPA. For this to happen, you need to impress your professor and show him that you’ve really worked hard on finding the best topic possible. This will earn you bonus points in almost every scenario. And this is exactly why you need our topics of physics. Now you don’t have to waste hours to find one topic. You have 50 to pick from right here.

Are Our Topics in Physics Free?

Of course, you are probably wondering why we are giving away physics topics for paper to everyone reading this post. The simple reality is that we want to help. Our physics essay topics can be used by anyone and they are absolutely free. You can use them as they are or modify them to suit your needs. Moreover, we are constantly updating our physics topics list to make sure as many students as possible can take advantage of them. We will keep this list of physics topics original by updating it frequently with new topics. And yes, it will remain free.

The List of 50 Interesting Physics Topics From Our Experts

If you are searching for any topics related to physics, you’ve arrived at the right place. We even have physics projects topics for you. Just take a look at the categories below and then pick the physics paper topics you wish to use. Modify them as you see fit or use them as they are. The result will always be an interesting, original physics academic paper.

Easy Physics Research Topics

If you don’t want to spend a lot of time writing your paper, use one of our easy physics research topics:

Physics IA Topics

Looking for a great topic for the Internal Assessment? Just pick one of the following physics IA topics and start writing:

Cool Physics Topics

Physics are cool, so why not pick some cool physics topics to write about? Here are some of the most interesting items on our list:

Modern Physics Topics

Advancements in physics are astounding. You have plenty of things to write about. Here are some examples of modern physics topics:

Physics GRE Topics

Our physics GRE topics are the best you can find. Try your hand at writing an excellent essay on any of the following topics:

SAT Physics Topics

Prepping for the SAT tests? Use our SAT physics topics and write the best possible essay. Practice makes perfect, so pick one today:

Physics Research Topics for High School

It’s not very difficult to find high school physics topics. However, it can be a daunting task to find unique, interesting topics like the ones listed below:

Interesting Physics Topics for Presentation

For when you need to write a presentation, you should carefully analyze our list of interesting physics topics for presentation:

Physics Topics for Project

Are you looking for ideas for your next physics project? We’re here to help! Pick one of our physics topics for project and start working today:

Advanced Physics Topics

If you want to write about something more complex, here are some advanced physics topics (college students are encouraged to use these as well):

Whether you need some physics topics for presentation or you need some great theoretical physics topics, our list will help you immensely. Why waste hours of work searching for a decent topic when you can simply pick one of ours and get straight to work? WE advise you to check out more fresh research topics in other areas of stuies. And remember, you can get many more physics science topics from our expert academic writers. They are always more than happy to help highs school and college students, so don’t hesitate to reach out!

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Top 100 Physics Topics For Your Project

 Physics Topics

You’re looking for physics topics because you’ve probably been asked to write a paper or essay by your educator. Physics entails the study of energy and matter. It also involves the study of how they interact with each other. This study field is generally broad and this makes choosing interesting physics topics to write about challenging. You can easily find mastering physics problem solutions , but choosing a topic for your own project is something completely different.

Nevertheless, physics is among the fundamental sciences that enable students to understand their world and how the universe and all things therein function. And, students can opt to study different areas or aspects of this broad discipline. If not sure about the topics of physics that you can research and write about, here are some of the suggestions that you can consider.

Medical Physics Topics

Physics plays a significant role when it comes to medical inventions. Here are some of the topics to consider if interested in medical physics.

Choose your physics research topic from this category if interested in something that relates to medicine. However, be ready to research extensively and spend several hours writing your paper.

Physics GRE Topics

Perhaps, you’re interested in physics GREs. In that case, you need to know some of the cool physics topics to consider in this area. This list of physics topics provides some of the ideas that you can explore in your research and writing.

These topics should guide and help you decide on what to research and write about. Nevertheless, pick a topic that you’re interested in to enjoy researching and writing about it.

Modern Physics Topics

Maybe you want to write about something contemporary. You could even be looking for modern physics topics for presentation. In that case, pick a topic from this category.

Any student that is interested in modern physics projects topics will find these suggestions quite interesting. Nevertheless, you should be ready to invest time and hard work to come up with a great paper about any of these topics.

SAT Physics Topics

If you’re taking an SAT physics course, you will find topics in this category quite interesting. This list of SAT physics topics for paper will guide you in deciding what to research and write about.

These are fun physics topics to research and write about. However, they require extensive research to come up with solid papers. Therefore, be ready to spend time researching and writing if you pick any of these physics project topics.

Mathematical Topics in Physics

Maybe you prefer physics research topics that are more of mathematics than science. In that case, consider these physics research paper topics.

These are great physics paper topics for students that are interested in physics and mathematics. But they also require time to research and analyze information to draft brilliant papers.

Physics IA Topics

Maybe you’re looking for physics essay topics for internal assessment. In that case, consider topics in this category.

Any of these physics science topics will be great for internal assessment. These also topics in physics high school teachers encourage learners to explore.

MCAT Physics Topics

Maybe you are interested in physics regents topics. In that case, consider MCAT topics. This area focuses on biochemistry, biology, general chemistry, physics, organic chemistry, sociology, critical reading, and psychology. Some of the topics to consider in this area include the following.

AP Physics Topics

If you’re interested in Advanced Placement Physics, you should pick a topic for your paper or essay from this category. You can even find brilliant theoretical physics topics to write about from this category.

Easy Physics Topics for Research

Perhaps, you need topics that won’t take you a lot of time to research and write about. In that case, consider topics in this category.

Whether you’re looking for general topics or special topics in calamity physics, this list has great ideas to explore. Pick a topic from this list and then research it extensively to come up with a brilliant paper or essay. If you need assistance, contact physics homework helper . Professional help is always a couple of clicks away.

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AS and A-level Physics

Specification at a glance

AS and A-level Specification at a glance

These qualificationsare linear. Linear means that students will sit all the AS exams at the end of their AS course and all the A-level exams at the end of their A-level course.

Subject content

Core content.

Assessments

Physics is the most fundamental of the experimental sciences, as it seeks to explain the universe itself from the very smallest particles to the vast distances between galaxies.

Despite the exciting and extraordinary development of ideas throughout the history of physics, observations remain essential to the very core of the subject. Models are developed to try to understand observations, and these themselves can become theories that attempt to explain the observations.

Through studying a science subject students should become aware of how scientists work and communicate with each other. While the scientific method may take on a wide variety of forms, the emphasis is on a practical approach. In addition, through the overarching theme of the “Nature of Science” this knowledge and skills will be put into the context of the way science and scientists work in the 21st century and the ethical debates and limitations of creative scientific endeavor. 

The sciences are taught practically. Students have opportunities to design investigations, collect data, develop manipulative skills, analyse results, collaborate with peers and evaluate and communicate their findings. The investigations may be laboratory based or they may make use of simulations and databases. Students develop the skills to work independently on their own design, but also collegiately, including collaboration with schools in different regions, to mirror the way in which scientific research is conducted in the wider community.

Physics syllabus outline:

 higher level (240 hours).

 Standard level (150 hours)

Key features of the curriculum and assessment models.

The external assessment of physics consists of three written papers. In paper 1 there are 30 (at SL) or 40 (at HL) multiple-choice questions. Paper 2 contains short-answer and extended-response questions on the core (and Additional Higher Level (AHL) material at HL). Paper 3 has two sections; Section A contains one data-based question and several short-answer questions on experimental work on the core (and AHL material at HL). Section B contains short-answer and extended-response questions from each of the four options.

Much of this information is taken directly from the physics subject guide, available to all IB teachers on the programme resource centre.

Learn more about physics in a DP workshop for teachers . 

physics paper 3 topics

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50 best physics topics for all levels.

February 27, 2020

Physics Topics

Physics is the branch of science that studies the nature and properties of matter and energy. As this is a vast subject, there are many physics topics and phenomena to consider to last a lifetime. Therefore, choosing topics in physics either for a project, research, or presentation may be quite demanding, and this is why we offer you this list of interesting physics topics. These cool physics topics will give you just the calm you need for that research paper, presentation, or exam. Without further ado, let’s delve into the physics topics list prepared specially for you!

Physics Research Paper Topics

As a student, you’ll be have to write a research paper during your studies. Every student offering physics has a range of physics research topics they find interesting. Sometimes, you may have the liberty to choose your physics paper topics, and at other times, the professor may give you some physics topics for paper. If you have the liberty to choose physics projects topics, rejoice! While rejoicing, though, remember that choosing physics topics for project or research could be difficult, but at least you can work on areas you most enjoy.

There are a lot of physics research topics for high school. Are you ready to explore physics project topics? Let’s roll!

Physics Essay Topics

Sometimes, students may be required to write a physics essay on physics science topics or topics related to physics. If you’re given the liberty to choose a topic, then you must select interesting topics. Below are some physics essay topics that are cool and captivating.

High School Physics Topics

There are a lot of topics in physics high school curriculum that students are required to study. Sometimes, these topics of physics could include advanced physics topics, mainly taken by people who want a career in physics or science. The topics taught in high school caters for SAT and some other exams. The high school physics topics are therefore embedded in the SAT physics topics below.

SAT Physics Topics

Are you looking towards taking the SAT physics and would like to know where your focus should lie? This SAT physics Topics list will serve as a guide to the essential areas of physics to cover!

Physics GRE Topics

Are you looking towards taking the physics GREs and would like to know what areas of physics to concentrate on? This physics GRE topics list will serve as a guide to the essential areas of physics to cover for your exam!

Physics IA topics

These physics IA topics will help you to write an outstanding paper!

Physics Topics For Presentation

You may be required to give a presentation on diverse topics of physics. As a presenter, you must ensure that you choose interesting physics topics for presentation with amazing concepts!

Theoretical Physics Topics

A theoretical physicist attempts to comprehend nature and the laws governing her. They do not carry out a direct observation of nature or conduct experiments like practical or applied physicists. Theoretical physicists use mathematics to develop and refine physics theories. Here are some theoretical physics topics for your theoretical mind!

So here we are! 50 physics topics just for you! With this list of physics topics, you’ll surely compose a masterpiece. In case you need assistance, don’t hesitate to contact our writing service .

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Revision notes for IB Physics

Topic 3: thermal physics.

See the guide for this topic.

3.1 – Thermal concepts

Molecular theory of solids, liquids and gases.

63065-004-07b69f7b

Molecules are held together by intermolecular forces.

The fourth state of plasma is not required to be learnt in the current syllabus.

Temperature and absolute temperature

Temperatures describe how hot or cold an object is and determines the direction of heat flow between two bodies.

Thermal energy transfers from an object with higher temperature to another object with lower temperature. The energy transfer is called heat (the flow of energy due to temperature difference). Objects which are in thermal equilibrium have the same temperature.

cond_conv_rad_small

Temperatures in Kelvin can be calculated by deducting the temperatures in Celsius by 273.15.

kelvin-celcius-conversion-formula

The absolute temperature of a body in the Kelvin scale is directly proportional to the average kinetic energy per molecule inside the body.

Absolute zero is 0K or -273 degrees Celsius.

Temperatures cannot be lower than absolute zero. It is the temperature where particles have zero average kinetic energy (no random motion).

Internal energy

Internal energy is the sum of total kinetic energy (total thermal energy) and total potential energy.

Kinetic energy is energy associated with the random/translational rotational motions of molecules.

Potential energy is associated with forces between molecules.

Specific heat capacity

The specific heat capacity of a substance is given by

heatcapacityformula

and is defined by the amount of heat needed to raise the temperature of 1kg of the substance by 1K.

Different substances have different specific heat capacities because of different densities and physical properties.

The thermal capacity of an object is given by Q=cθ (or Q=cΔT) and is defined by the amount of heat needed to raise an object’s temperature by 1K.

Phase change

During a phase change, temperature and kinetic energy remain constant and potential energy changes (which increases as molecules spread out and vice versa).

Boiling: Only occurs at the boiling point (a specific temperature depending on substance) and occurs throughout the liquid.

Evaporation: Can occur at any temperature and only occurs at the surface of the liquid. The fastest moving particles evaporate, decreasing the average KE of the remaining particles. As a result, temperature drops.

Specific latent heat

The specific latent heat of a substance is given by

latentheatformula

Specific latent heat of fusion: The amount of heat required to change 1kg of a substance from solid to liquid without any change in temperature.

Specific latent heat of vaporization: The amount of heat required to change 1kg of a substance from liquid to gas without any change in temperature.

3.2 – Modelling a gas

Pressure is defined as the normal force per unit area and is given by the equation

Equation of state for an ideal gas

gaseq0

where R=8.31(J/mol/K)

Kinetic model of an ideal gas

Assumptions:

Implications:

Absolute temperature is directly proportional to the average KE and average speed of the molecules of an ideal gas.

Mole, molar mass and the Avogadro constant

Molar Mass:

Avogadro constant:

6.022*10^23

cf89cd828630c9b3e8e0f9d204232952

Differences between real and ideal gases

The ideal gas is based on a list of assumptions stated previously. However, in real gases, such assumptions may not be true.

Real gases may behave similarly to ideal gases under high temperatures and low pressure.

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Physics GCSE Past Papers

This section includes recent GCSE Physics past papers from AQA, Edexcel, OCR, WJEC, CCEA and the CIE IGCSE. This section also includes SQA National 5 physics past papers. If you are not sure which exam board you are studying ask your teacher. Past papers are a useful way to prepare for an exam. You can download each of the exam board's papers by clicking the links below.

physics paper 3 topics

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AQA AS Physics

Cie as physics, edexcel as physics, ocr as physics.

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Topic 3: Thermal physics

Topic 3: Thermal physics

Table of Contents

3.1 – Thermal concepts

63065-004-07b69f7b

Molecules are held together by intermolecular forces.

The fourth state of plasma is not required to be learnt in the current syllabus.

physics paper 3 topics

Temperatures describe how hot or cold an object is and determines the direction of heat flow between two bodies.

Thermal energy transfers from an object with higher temperature to another object with lower temperature. The energy transfer is called heat (the flow of energy due to temperature difference). Objects which are in thermal equilibrium have the same temperature.

cond_conv_rad_small

Temperatures in Kelvin can be calculated by deducting the temperatures in Celsius by 273.15.

kelvin-celcius-conversion-formula

The absolute temperature of a body in the Kelvin scale is directly proportional to the average kinetic energy per molecule inside the body.

Absolute zero is 0K or -273 degrees Celsius.

Temperatures cannot be lower than absolute zero. It is the temperature where particles have zero average kinetic energy (no random motion).

Internal energy is the sum of total kinetic energy (total thermal energy) and total potential energy.

Kinetic energy is energy associated with the random/translational rotational motions of molecules.

Potential energy is associated with forces between molecules.

The specific heat capacity of a substance is given by

heatcapacityformula

and is defined by the amount of heat needed to raise the temperature of 1kg of the substance by 1K.

Different substances have different specific heat capacities because of different densities and physical properties.

The thermal capacity of an object is given by Q=cθ (or Q=cΔT) and is defined by the amount of heat needed to raise an object’s temperature by 1K.

During a phase change, temperature and kinetic energy remain constant and potential energy changes (which increases as molecules spread out and vice versa).

Boiling:  Only occurs at the boiling point (a specific temperature depending on substance) and occurs throughout the liquid.

Evaporation:  Can occur at any temperature and only occurs at the surface of the liquid. The fastest moving particles evaporate, decreasing the average KE of the remaining particles. As a result, temperature drops.

The specific latent heat of a substance is given by

latentheatformula

Specific latent heat of fusion:  The amount of heat required to change 1kg of a substance from solid to liquid without any change in temperature.

Specific latent heat of vaporization:  The amount of heat required to change 1kg of a substance from liquid to gas without any change in temperature.

3.2 – Modelling a gas

Pressure is defined as the normal force per unit area and is given by the equation

gaseq0

where R=8.31(J/mol/K)

Assumptions:

Implications:

Absolute temperature is directly proportional to the average KE and average speed of the molecules of an ideal gas.

Molar Mass:

Avogadro constant:

6.022*10^23

The ideal gas is based on a list of assumptions stated previously. However, in real gases, such assumptions may not be true.

Real gases may behave similarly to ideal gases under high temperatures and low pressure.

Cambridge IGCSE Chemistry (0620) Past paper 2021

Cambridge igcse english - first language (us) (0524) | 2016.

Reasons why you should use past papers in your revision

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