GCSE Physics - Reducing Energy Loss - Insulation / Lubrication / Aerodynamics #6

[@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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I have learned ... kinda a lot ngl great vid.Cheers

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Good vid helped before exam

[@Cognitoedu]

Thank you! Glad it was useful :)

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[@jawaadhussain7468]

You missed Loft insulation materials which can deduce the affect of convection. :)

[@mafsiddiqui1]

Have you already explained what is efficiency? If so which video is it?

[@YusufIsmael-g6e]

Lol just search energy calculations

[@mafsiddiqui1]

@@YusufIsmael-g6e Okay, thanks!

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A real exam hero

[@harry-ji2pq]

0:53 is that a sam fisher reference? the cat in the window lol

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I’ve told all my friends about you thx

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here the morning before the exam😀👌🏼

[@Cognitoedu]

Hope it went well 🤞

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Hope you passed

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great video learned a lot

[@keroy09]

no way i did this in class and didnt understand now i know legit everything

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please do electromagnetism

[@xiayuanlong6950]

Hi Cognito, why the title included Aerodynamics? I haven't understand what part of video talked about that, it is about the air gap?

[@LukeFisher-k8r]

The planes and the cars at the end mate

[@xiayuanlong6950]

@@LukeFisher-k8r thank u man finally someone answer me after my IGCSE

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Yeah the planes and cars

[@xiayuanlong6950]

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We can make the house painted white right?

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tanks for just being help-full!

[@Cloudski23]

Can you further explain more ways to stop emenergy loss like loft insulation etc.

[@jacklogan5240]

i should have been revising earlier man im cooked 💀

[@your.local.multistan]

same bruh my exam is tomorrow

[@themoviehub7082]

what does convection and conduction mean any1

[@usu4095]

convection is when a heat source heats a certain part of a liquid or gas. The particles in this region gain kinetic energy because it has been heated, so the distances in between the individual gases expand, As they expand, this part of the gas/liquid becomes less dense, meaning it starts to float over the top of the part of the gas/liquid that has not been heated as much and is denser. This is also how radiators work. As the less dense air/liquid on top gets cooler, (because the energy in its thermal energy store has been transferred to its surroundings like walls), it moves back down again and replaces the newly heated part of the liquid/gas which creates a convection current. Conduction is more common in solids. When you heated a certain part of a solid, the particles start to vibrate more and collide. These collisions transfer energy to the neighboring particles of the solid or other solids. Its harder for air to conduct because air already has lots of energy and is moving around a lot, it is harder for the energy to be transferred to its particles. I hope this helped, or at least a little.

[@mujtabaazeem-l3f]

@@usu4095 :salute:

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underrated

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1st

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@haizys You say you don't care yet you invested the time to respond rudely. You're not only impolite, but you don't know what 'illiterate' means and you're contradictory.

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did you do good in your GCSEs lol

[@sjd_1111]

I was 1st

[@jonesyjr9200]

My physics exam starts tomorrow so of course I’m here getting some last minute revision

[@umarsharif4105]

same

[@sjd_1111]

@@umarsharif4105where you replying a year later idiot

[@bytecode5834]

Thanks for the gift

[@idrk1507]

Double glazing contains an air gap- can’t that cause convection?

[@someone8335]

actually, most of the time it's filled with a noble gas like Argon which has the lowest convection.

[@philipbrady9358]

Great

[@bradysmudge]

thank you

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why is there a raccoon in the house?

[@GoblinKing-f5p]

Is that a raccoon? Looks like a cat wearing night vision goggles to me. Or an alien dog. Who knows?

[@yustmanplayz4960]

to be fair it kinda does look like a cat wearing night vision goggles from close but who knows

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You legend

[@DocChrome]

Add music to the background. Doesn't have to be loud.

[@Yma0104]

ur here to revise why would u want music?

[@MuhammadDaudJan]

@@Yma0104 no, a soft tune would be more calming

[@MuhammadDaudJan]

it's a good suggestion

[@thejanofalltrades]

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[@thejanofalltrades]

Daud are you here to study?

[@MuhammadDaudJan]

HALLO

[@thejanofalltrades]

?

[@cptgreylight2745]

E

[@tila7702]

Couldn’t have said it myself better

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[@zoisapeers676]

You spelt pedal wrong. It's meant to be p - e - d - a - l

[@pratheesh2105]

correct observation: 'peddle' means try to sell (something, especially small goods) by going from place to place. you can understand why he might have spelt it like that, since he uses 'pedal' in the verb form i.e. he pedalled, not he peddled

[@Yma0104]

don't act smart lmfao, you don't know anything