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
Not going to lie but what my teacher took 2 hours worth of lessons to explain what you did in 5 minutes. You make teaching look easy. Thank you for this.
i thought i was gonna die in the middle of the physics exam .. i watched 27 videos of the physics playlist nonstop ... i swear to god my brain was digesting stuff i thought they were hard and i did well in the exam Tysm Cognito I will edit this comment and tell you the results :D 97 outta 100 :>
@@Cognitoedu You are so amazing. What i do is i watch the video, re-watch it making notes and turn notes into colourful posters. It is incredibly helpful and makes me suceed in exams much better so huge thank you as could not do it without your help!!
@@Cognitoedu Before using your videos was getting grade 3 and 4 is science and was thinking about doing foundation. but after using your videos now getting 6, 7 and 8 and going higher. Thank you!!!
Great video! Just wanted to ask if for the energy transferred in a lightbulb, you could start with electrical energy (even though it is not an energy store, would this still get you full marks in an exam?). And then this would be transferred electrically in wires, to thermal energy to the surroundings, and lighting the bulb?
For the question with two lamps, can't you just divide the useful output of energy of the second lamp by that of the first lamp? Surely if the input energy of the two lamps is the same, there is no need to use the equation? Thanks for the video though, it really helped!
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
nothing is 100% efficient except Cognito
and a heater...
@@MI-lo2hj no because a heater isn't a device because it's 100% efficient and cogi said devices arent 100% efficient
@@Wojbest_YT bruh look 10 seconds after that
@@Wojbest_YT heaters produce thermal waste energy whihc is acctually useful unquote
ur moms pretty efficient
Last minute mock gang where u at? 😭
Here omg I have mock in 3 hours and I just started studying
5 months later
HEREEE
Last minute finals gang here 😈 safe to say I'm fked in this physics exam
we here
Me😭 class of 2025
Not going to lie but what my teacher took 2 hours worth of lessons to explain what you did in 5 minutes. You make teaching look easy. Thank you for this.
yh
i thought i was gonna die in the middle of the physics exam .. i watched 27 videos of the physics playlist nonstop ...
i swear to god my brain was digesting stuff i thought they were hard and i did well in the exam
Tysm Cognito I will edit this comment and tell you the results :D
97 outta 100 :>
I hope it went well! Did you get your results yet?
@@belladormer6918 I got 97 out of 100 c:
@@m7md_bss its good
@@laethferas4214 ty mate
all thanks to cognitooo
@@m7md_bss damn bro I have my physics exam tomorrow morning
Cognito is my only hope
I'll tell you the results when I get them
This channel is a hidden gem.
Thank you so much !!!
1000% true
thank you omg you're so underrated
Thankyouuu Fatima! 😊
@@SajjadAli-er4fh her username prolly was fatima b4 and she changed it later
I recommend this channel as a cheat code to your exam .share it so the world can have more genius people.🗿🗿
Got a really important science test soon so thanks for this I needed to refresh my knowledge on it all , thankyou :)
Hope the test went well 🤙
Full a* brudda
@@Cognitoedu You are so amazing. What i do is i watch the video, re-watch it making notes and turn notes into colourful posters. It is incredibly helpful and makes me suceed in exams much better so huge thank you as could not do it without your help!!
@@Cognitoedu Before using your videos was getting grade 3 and 4 is science and was thinking about doing foundation. but after using your videos now getting 6, 7 and 8 and going higher. Thank you!!!
@@oscarpeters103 woah gd for u
I’m in year 9 and yet these videos are so helpful! Thankyou so much cx
Really happy to hear they’re helping!
same
me 2
Finnaly finished this topic energy all you videos help so much thank you.
these videos are so helpful, thank you!!
I appreciate you letting us comment
fr
Great Video! Really easy to follow and understand! Keep up the brilliant work!
bro i watched a couple of your vids just before my exam and if it weren't for you two of my exam pages would be empty thank you sooo much
Really glad we could help AllRoundGamer!! 👍
Why is youtube so much better than the actual lessons?
reteaching myself all my physics before y11 bc i dont get any of jt, you guys rlly helpp
ur videos came in clutch for my exams so thanks man
Great to hear Afnan, hope your exams go well! 🤞
not going and lie you actually made this topic sound soo simple
thank you so much... this video is a lifesaver!
Thanks for this helpful video! It helped a lot with the understanding of efficiency.
These videos are all way great and helpful 😊❤👌
You saved me today mate 😧
very helpful, especially when i need to revise for exsams
Glad to hear that Gacha 👍
That actually cleared some doubts, thanks!
Hey Ani thanks for the comment! Really happy to hear it cleared things up for you - good luck with the rest of your work! 🙌
@@Cognitoedu Nam
Is it same like for example charger brick
Input is 230v output is 5v.
How about appliances that shows only input?
thank you for the help it was so helpful appreciate you doing this for everyone here
Glad we could help you articwolf
This is great! Thank you!
You saved my life
04:43
Electric Heaters also produce waste energy... in the form of SOUND
thank you I have an assessment tmr and i forgot how to calculate effiencency with decimals !
cognito is the best and the thumbnails are so good
Ah thank you so much Beulah 😊
your videos are so helpful, thank you so much!!!
Thank you for this
Watching this a few hours before my monthly:)
An intimate discussion with Binance's CEO about future developments
Good science teaching bro
well explained .. thank you.. keep it up
Hey thanks for the support really appreciate the kind words! And also TY for leaving us a comment it really helps the videos get seen etc 💛
i love these videos, they a short and concise
In business and in life, may you wear a smile.
Man just saved me from depression 😭
Thnx this rlly helped I subbed
Thanks for the sub! 😊
ik this is quite late but don you x100 after you do your calculations?
Ur Videos are the best, checking my answers, you helped me get it right
Thanks a lot for this I wasnt sure about this subject till I watched this 😛✋🏽
Glad it was helpful Amelia 👍
@@Cognitoedu Alya probably changed her name
Great video, easy to understand, thanks!
Thank you! 😊
Thanks for this
Thxs I needed that
You’re welcome!
Wow,best explanation ever. 👌👌
Thank you so much sir
Thanks a lot make more of these videos
I’m doing this in physics but with time variables which make it a bit harder. I also have to use power output instead of this one.
thanks this helped a lot
Anyone else got this video prepared because there meant to be revising incase ur mum walks in haha
Well explained!
Can light energy be counted as wasted energy for heaters?
Yes light + noise too
Thanks
no u
thankyou i really needed serious help BTW thanks
Legend 🙌🙏👑
thx so much! this is a really good video!
Many thanks
Well explained.... thnx!
Hey thank you for leaving us a comment, and really happy to hear it’s helpful to you!
thank you so much
Can someone explain to me what is the difference of GCSE And IGCSE
IGCSE just means 'international GCSE', so it's a slightly different course done across the world (but most topics are pretty similar)
@@Cognitoedu thank you so much
this is the most use ful vid eveaaaa
Thanks for the good explaining. So helpful.
Glad you liked it Imran 😊
Nice video
Binance's CEO opens up about future developments in an exclusive interview
Thank you!
You legend
Is the total power input in horsepower or normal power
Great video! Just wanted to ask if for the energy transferred in a lightbulb, you could start with electrical energy (even though it is not an energy store, would this still get you full marks in an exam?). And then this would be transferred electrically in wires, to thermal energy to the surroundings, and lighting the bulb?
Electrical-->light+heat (I think)
Catch an exclusive interview with Binance’s CEO to get the scoop on future developments
Like it, nice!
But i am intelegant too 😐😐
Love it
perfect
yeah I enjoyed it 🧣🦧🤧
When you explain it, it is hundred percent easier than my teacher teaching it 😊😊😊😊
why can't I get explanation like do in school.
Thank you so much this is really useful!!!
Glad you liked it 😊
The last weekend before mock….
Please explain in urdu
You are 💯🧑💻
wait a minute in my opinion just divide like a 225 divided by 45 answers are same
👏👏👍 👍
Very helpful, thank you!
I enjoyed it r u happy
Last exam today. Only need 60ish marks for 9-9
the information is correct of course (probably), but you don't need to be getting people through school on a computer??????
it's pretty clear now thanks to you
Nice thanks. xoxo
POV: your teacher sent you this video in grade 7
Cognito and FreeScienceLessons makes this soo easy
ikr
👍
Paper in 2 hours😢😢
Should I be watching this if I'm in year 9
lol its not like its rated R my g you good
pray for me gang I have my physics exam tomorrow 🙏
Mee too😢
haha
@@astraboost1615 I ended up getting a good grade lala
@@-._.ETHAN._.- i aint talking to u
@@-._.ETHAN._.- wait what did u get
very good vedio really helped me out thanks alot👌👌👏👏👏
For the question with two lamps, can't you just divide the useful output of energy of the second lamp by that of the first lamp? Surely if the input energy of the two lamps is the same, there is no need to use the equation? Thanks for the video though, it really helped!
Seriously, more expected actions for a refund?