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Found 14 results

  1. Hi, I'm doing my G4 project (presentation), and I have students from biology and physics with me in a group. We've got a topic ENERGY (we can't choose\change). How do we make a project out from these subjects with that topic? Combining biology and physics into energy. Any ideas would help! Sincerely, Anastazja
  2. Hi all. I have been told to come up with a subject and a rough research question for my EE. I spent the whole day reading and having classes about the EE, and I have decided that I am going to be writing it on Biology. I already know that this subject is quite hard to get a good grade on, however it is the only topic in which I am passionate about enough to write my EE. (I am not willing to change subject or topic). So far I have a few rough ideas on what I want to do: Specific diets and their impact upon heart problems Something on hormones Why certain vitamins are needed by the human body How weight, exercise, smoking and stress contribute to heart diseases. Energy needed by the body I have a lot of interest in these subjects, however I have found it hard to come up with research experiments that are needed for me to be able to write a good EE. Do you have any ideas? I know that I cannot really experiment much on the human body, so this is why I have found it hard to come up with ideas. People have suggested the idea of exercising and eating different amounts of calories etc and seeing the effect on blood and heart rate etc. over a period of weeks, however I feel this might not be original enough for an EE? Any advice on this?
  3. Hey do any of you know where I can find practice question for option C? So far I've only done the specimen paper and questions from the oxford textbook. Also are there any data analysis tips/tricks I should know about for paper 3? Thanks!
  4. Hey All! I'm doing the Energy option this may in my exam, and as I've been revising I realised that there are a lot of redox reactions to be covered for the rechargeable cells and fuel cells HL topic. I just wanted to know, are we expected to memorise these reactions and be able to reproduce them in the exam or just understand how they work (meaning that we indirectly talk about them or have the equation given and then do some work with it)? Thanks! P.S. @Msj Chem: Thanks so much for your videos! We didn't have too much time to cover the option in school, so I learned most of it using your YouTube videos and my textbook.
  5. Hi, My school has selected medicinal chemistry for the options topic, however, I'm currently struggling with it due to it containing excessive amounts of biology and organic chemistry. I'm doing HL physics and think I would do a lot better at the energy option. Is it possible for me to answer the energy option in paper 3 instead? For maths HL we are only given questions on our option topic and for English we have to refer to the texts selected by our school. However, for sciences I know that the paper 3 contains all topic questions. Would the examiners still mark the questions I've competed even if other students answer on a different topic? Any advice would be very helpful right now! Thanks
  6. Hey everyone! As the title suggests, the syllabus says that we should be able to discuss "how the choice of fuel is influenced by its energy density or specific energy." I understand that a higher energy density and specific energy means it is an effective fuel, but how about when there's two fuels, one with a higher energy density and lower specific energy versus one with a lower energy density and higher specific energy? Which fuel would be the better choice? I think I can save another post by asking my other question here: For everyone else doing Energy, we are aware that it is a new option and thus it has no practice questions from past exams. How are you guys studying/practicing for the upcoming paper 3? I have the Pearson textbook and the Oxford study guide, do you think that is sufficient? Thanks!
  7. Hi everyone. I've written two short guides on IBS: Time managementPreventing and managing stressThe following is about how to create realistic plans. It's adapted from my blog. I hope it helps. There are two easy ways to create feasible plans: Pretend you have 30% the energy you usually have Copy a plan you’ve completed successfully beforeNote that I’ve left out the most obvious way – looking at a calendar and the things you have to do then filling up the hours. Why don’t we stick to plans? It’s simply too difficult For some reason, if we imagine a free day we imagine a lot of time. But we also assume our energy levels will match that. It often doesn’t. Cramming the day with loads of activities is only going to make you tired quickly and far more likely to stop doing them even in the middle of the day. If it’s a long term plan it’s even less likely to continue. We get distracted Distractions are a huge problem. As research shows, after a distraction, it takes about 25 minutes to get back into work. It makes our work far less efficient and moves everything in the plan forward. Therefore we work longer, become more tired and start putting things off. We don’t give ourselves enough time We might assume that we can get an essay done in 3 hours but sometimes we might get stuck which means we have to take a longer break. Or we can’t find the book we want. Same with side projects you might want to do after work/studying. If we expect to do all of them in a minimal time then we’re either going to drop them completely or reduce them drastically and feel guilty about it. We procrastinate Looking at a large plan for the day can be intimidating and cause us to procrastinate. Therefore we don’t do anything we aim to. Here’s one simple way to stop it. Making plans work Assume less energy than normalThis point relies on assuming you have less energy than your plan assumes. If we try being superhuman then get intimidated or worn out by our plan, it’s not a useful. On the other hand, if we’re more modest, we have a much easier starting point, procrastination is less likely and we will complete things. Let’s take one of the plans I’ve had in the past (and I’ve had many): This is actually a simplified version of a plan I had at one point in my first year of university. Looking back on it, it’s surprising to think that I considered it then even more surprising is that I was annoyed when I couldn’t complete it! Nearly 9 hours of difficult (and unnecessary!) work I had planned. That’s on top of being social, dealing with chronic pain and you know, trying to not hate books after my first week. The plan didn’t work for a variety of reasons: I didn’t have the energy to complete themI ignored other factors (like having friends and going outside)It was boringIt wasn’t flexibleCreating the plan with the mind that you’ll have less energy means you plan to do fewer things, increase flexibility and still complete things. So the plan above might turn into this (assuming there’s a 9am start): And that’d be it. The first plan has nearly 9 hours of mentally tasking work while the second has 4 hours with large breaks in between. It’s much easier to start and I found I got more work done with the second plan overall. Copy a previous plan.The second condition is easier to implement. If you’ve successfully created and completed a plan before, copy it and use it again. However, it’s important to take into account new factors when doing this because your past plan might have been completed under much different conditions. For example, if you’ve caught a cold, your energy is going to be lower than it would be normally so you’ll complete less work or it’ll take longer to complete the same amount. But remember to be reasonable. If you’ve planned an overnight stay at your library or a general rush till exams, you won’t be able to sustain it for a long period. To combat that, refer to point one. An impromptu Q&A session “But you’re doing so little work – this doesn’t apply to me!” Fortunately, it still does. If you’ve ever planned anything and never completed it (although you feel you should have) then it applies. Creating unrealistic plans is normal and unless you actually have unlimited energy, it’s fine to plan less and complete more. Dealing with chronic pain means I’ve had to change how I view plans and making my time more efficient. This is one way I’ve managed to stay with the crowd despite being in pain all the time. “But what if I can’t plan less! I have so much more work to do than you” That’s where the second condition comes into place. Not every plan can work on such little energy. Deadlines and loads of work exist. If you’ve actually completed a plan that meets the demands of your current situation, mould it around that. If not, continue to assume you’ll have less energy when creating it. And stop procrastinating. Yet, don't use this excuse to return to an unrealistic plan crammed with work from the time you wake up to the time you sleep. “What if I have scheduled commitments?” If you have a variety of things you want to do (clubs, learning new things, blogging etc), reducing the amount of energy you’ll have to complete it seems ridiculous. It isn’t. In this scenario, you have to exercise prioritising and say no to some commitments. If you don’t, there’s a good chance you won’t do them, get frustrated at the ‘little free time’ you have or burn out very quickly and blame yourself. Admittedly, it is difficult saying no to things especially when you seem to have a lot of time for trying new things. Those things won’t disappear straight away and there’s no point in planning them if you’re too tired to complete them. It’s alright to say no. This is a big thing for IB students. Especially if you feel that extracurriculars are extremely important. However, there are a few more things important than extracurriculars and even grades. Your health. Running on low energy and being on the verge of burn out for two years is damaging. It can have adverse affects like putting you at risk of depression and other health problems that happen as a result of stress. Take the time to assess your priorities throughout the school year and decide what you want and need to do. While the IB is a difficult time for many, you do not need to assume it'll be difficult and aim to fulfil that prophecy. "I'll try to do that but which would you pick, sleep, study or social life?" This is genuinely one of the biggest lies about the IB ever. It's sometimes funny to joke about how little sleep you get but there's nothing to be proud about when it comes to getting little sleep. You can have all three. I recommend you have all three. Studying is important for getting good grades. Sleep is important for every activity you do. Sleep debt is a thing. If you consistently go without sleep, it's not much different from not sleeping at all. For example, if you consistently shave 2 hours off your sleep for a week then at the end of the week, your attentiveness is the same had you not slept for an entire day. Socialising with other people can be fun and a welcome break from reading books all the time (which is inefficient since concentration levels drop throughout the day). Plan less and give yourself more time to enjoy your day. Your grades will thank you for it. “Am I allowed to continue working past my smaller plan?” Yes. A minimal plan makes it easier to start working. It doesn’t necessarily put a limit on how much you should continue working. Though, it should make you more efficient with the hours planned – reducing the need to continue working much more. The next day, return to the minimal plan. A good plan is sustainable. “I’m rubbish with times. What if I oversleep?” Ignore times and focus on activities. Instead of planning the hours, aim to work on a project for an hour in the morning and an hour in the evening. If that is too difficult, aim to do an hour of the project during the course of the day. The earlier the better of course as you don’t want tiredness to excuse you from working. “Did you write these questions yourself?” Some things are best kept secret. Action Steps The take away from this is to reduce the amount of energy you’ll need to finish a plan so it’s easier to start and easier to complete. What can you do now? Create a plan for your ideal day Assume you’ll have less energy than normal Create a new plan.A small amount of completed work is better than a large amount left wished to be completed. If you have any questions or suggestions, feel free to add them
  8. Hrishi98

    Thermal Physics

    Using the data below, estimate the mass of water turned into steam as a result of this heating process. initial mass of water = 0.30 kg initial temperature of the water θ = 20°C specific heat capacity of water = 4.2 × 103 J kg–1 K–1 specific latent heat of vaporization of water = 2.3 × 106 Jkg–1 The no.s are superscript in some of them.... And pls can anyone solve the mass of the water turned into steam?
  9. I have started thinking about my EE about physics. I would like to do it about how does air friction affect acceleration on rollercoasters. I have already collected the data but I don't know if the topic is suitable enough to do an EE. Is the level enough for an EE? How can I make it more narrow and increase the level? Would it be recommended to do a 3D graph with the data I have collected, or it wouldn't be suitable for the physics area? Thanks!
  10. So I'm feeling really stressed out, as the question I chose for a design lab didn't really work out. (I had issues with the data.) I want to did an experiment and collected data after the prompt: Investigate a bouncing ball. I chose to look at kinetic and potential energy of the ball, then the total amount of energy possessed by the ball. But... I don't know how to word my question. I can't really change my experiment to word it how other sites are suggesting, so I'm kind of lost. I've done all the calculations, but I need some sort of question. Help? EDIT: Is this a clear and focused research question: What is the relationship between the kinetic energy and the potential energy possessed by a bouncing ball?
  11. So my Group 4 project is thermal energy and all I have been able to come up are the ideas all my physics and chemistry teachers call "simple". That's a bad thing so I need to come up with an idea for my Group 4 Project about thermal energy in chemistry or physics. This is my first time doing the G4 project and I need major help coming up with an idea because the topic is kind of to think about. Thanks!
  12. Hey everyone, I'm revising for my Biology mocks and one of the topics is units used in energy pyramids. Is it J kg-1m-2year-1? I can't seem to find it anywhere in my notes. Thanks!
  13. Since this is a new addition to the syllabus (well, since 2009), there aren't many practise exam questions on the topic. None that I can find anyway. In addition, the topic is rather large and I find it painfully boring to just read through the chapter and make notes. Thus, I was wondering if any of you could share some tips on how you're/you've tackled the topic and any useful/videos etc. From what I've seen, this is a topic that comes up quite often and forms a large part of paper 1 (which I'm terrible at) so I want to make sure I know it inside-out. Thanks in advance
  14. I need something to do with energy. Not the KE PE kind but like generating energy and all those green energy type of topics I need to submit it today!! Please help
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