GCSE Physics - Internal Energy and Specific Heat Capacity #28

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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Thanks Sorcha, we really appreciate it 😊

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THIS GUY HAS PUT ME IN SO MUCH CONFUSSION!!! In 1:16 He says that temperature is a "measure of the average internal energy of a substance" and this is WRONG. Temperature is apparently the measure of only the average kinetic energy!!!

[@yurrr552]

did you watch the video? he literally says internal energy is either potential energy stores but since this video is abt thermal energy internal energy is kinetic energy store in a substance

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[@teacherconor9037]

some misconceptions I think: temperature is proportional to THERMAL energy, not INTERNAL energy (which includes the potential energy stores of the particles too)

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Thanks Rawan, glad to hear you're enjoying them 😊

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Can you do a video on resistance and IV characteristics?

[@Cognitoedu]

Hi Jannel - take a look at our physics playlist there’s video covering resistance and voltage calculation in different circumstances :)

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Ppl who disliked this r jealous that they're not as smart as him

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This video made no sense

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@@AayushChitnis why are you watching it damn hate comments even in learning videos

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I did not dislike the video I’m giving my honest opinion not sugarcoating it

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[@Cognitoedu]

You’re so welcome! Thanks for taking the time to leave us a comment 🙌

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Your videos Are really helpful But could you please add more practice Questions and it would be better if its from a past exam paper . I would really appreciate it

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he has practice questions and past tests on his website, he can't add more to his vids coz then they would be too long

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You're very welcome!

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[@inaya8834]

why does the substance of specific heat capacity may give value greater than the actual value?

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Me 1 hour before exam:

[@dregwu8904]

excellent

[@shahnarifan6816]

Can you explain internal energy using an example question 0625/22/f/m/18 question 11

[@themusicguy9035]

What do you mean by system? 0:25

[@GamerJayden49]

I think he means an object or group of objects

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Go watch video

[@PariKalsoom-ob7qe]

Glad to know , I'm not the only one who didn't got it :''-)

[@TheVoidmasterEditz]

@@GamerJayden49 isn't that what a "system" is in this context?

[@alexlow9714]

1:54 Is it always have to be 1kg? Can i write 1 gram in the test?

[@arjjunmanoj7375]

no

[@farooqahmed1963]

No bcz this is the formula and it refers to 1kg specifically and there is a lot of difference between I kg and I g

[@INFINIT3Rxpct]

Not really, unless you write your specific heat capacity as ____ J/g (degrees) it would be incorrect

[@bradysmudge]

thank you

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How would you explain this to a third grader ?

[@MuhammadSajjadAli-qt3vf]

wtf is a third grader doing with specific heat capacity

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Thanks❤

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[@iya4631]

im confused on this bit 3:12 because I have done 0.8 x 4200 = 3360, then I divided 3360 by 20,000 which give me 0.168 not 5.95??

[@WaranaSJ]

the formula is E/mc so it will be 20,000J/(0.8kgx4200𝑱/(𝑲𝒈 ℃) which will be 5.95. its not 3360/20 000 ok

[@5wholepizzas284]

1:30 NICEEE

[@catuwu1527]

why is there one dislike

[@spookyking2307]

00:05 Internal energy relates to temperature using specific heat capacity 00:39 Heating a substance increases its internal energy. 01:13 Internal energy determines temperature 01:48 Specific heat capacity measures energy needed for temperature change 02:22 Internal energy equals mass times specific heat capacity times change in temperature 02:56 Calculating change in temperature using specific heat capacity of water 03:32 Converting energy units and calculating final temperature change. 04:04 Energy loss to surroundings affects temperature change

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I wanted to like but it’s at 420

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I didn't understand the example

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Me too

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Fucksake i still cant fucking understand mate

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[@CP0CC7]

so do I add the temp change into original and that's the change in internal energy? I wouldn't do 0.8x4200x5.95?

[@JosephPenman-t1r]

So useful for my mocks!