Why Silicon Valley needs a new name 

Graphene

Woke Wasteland

thank you for being picky. This is comment is interesting!

Thanks for that! 🤓

celsius doesnt refer to temperature?

⁠@@fetB There are multiple units to refer to temperature with varying precision such as degree Celsius, degree Fahrenheit and Kelvin, with Kelvin being the most suitable and commonly used in physics related calculations. This is due to different units having been made with different rules. Kelvin is an absolute unit resulting from thermodynamics laws, with 0 Kelvin being the absolute Zero, the lowest temperature physically theoretically possible (but not actually feasible in practice). Meanwhile degree Celsius is a relative unit that bases itself on water’s fusion and ebullition temperatures at normal pressure, with 0°C being the fusion temperature and 100°C being the ebullition temperature which makes it pretty convenient for everyday life use but also means it’s quite arbitrary. Since the fusion temperature of water at normal pressure also happens to be 273.15K and adding or subtracting 1°C is the same as adding or subtracting 1K, this means that {temperature In Kelvin} is exactly {temperature in degree Celsius} + 273.15. So when you have 300°C this means you have 300+273.15=573.15K. That might get you thinking the two are pretty similar and interchangeable but it becomes tricky when dividing or multiplying: if you divide 300°C by two you get 150°C which is 423.15K, but if you divide 573K by two you get 286.575K, that’s around 13.5°C. It’s a very big difference, which is due to scale and their starting points being different, one being absolute and the other relative. Strictly speaking, “half the temperature” would be way better suited as the Kelvin temperature divided by two since 0 Kelvin is actually the minimum temperature considered possible, which means “half the temperature” of 300°C would technically be 13.5°C. More generally, in physics when you speak of “half of something” it’s in absolute terms because it needs to be applicable in any case, so its about consistency. This is why we typically use Kelvin for scientific calculations, and Degree Celsius for convenience in everyday use. Edit: fact checked and reworded for clarity

@@hLux101 its not arbitrary when it is grounded and neither is celcius imprecise by any means, just because it is a relative unit that doesn't reflect "temperature" on a molecular or atomic level. So when you try to nitpick, do it right. Of course the difference can be significant when you use different units. 5km is a lot different than 5 inches, yet they both refer to a distance or length. It would also not be better suited to use kelvin since most anyone can relate to celsius. "strictly speaking" it would be the worst choice since the target audience is humans, which grind to a halt when exposed to below 0°C without protection and receive brain damage past like 50°C, so 150°C is a very significant showcase of difference however small expressed in kelvin. You could argue they could have displayed kelvin in parenthesis, but it wouldn't have made a difference. pun

here in Canada, geothermal heat pumps are known to be most efficient, the barrier is cost. natural gas is very cheap here, so people just heat with gas.

@@gabrieldsouza6541"natural gas" is methane, not only does burning it produce climate change emissions, but methane itself, when it escapes, is more than 28 times as damaging as carbon dioxide! And heat pumps, after the initial investment to install, are much cheaper to run - after all, you cant get cheaper to run than FREE if you have solar panels and a house battery.

@@TimLongsoni agree with you on the harms of gas heating, but the fact is that most people just don’t have the money to get solar panels (Canada has low solar irradiation due to to our high latitude) plus a home battery system. further, a significant portion (15-20%) of our population lives on the Prairies, where winter temperatures can reach up to -35C for days at a time. I understand cold-climate heat pumps have come a long way, but honestly I would want a backup heating system for those extra cold days. and also the point about running a heat pump is generally true, unless electricity costs more than gas, which actually is the case in some Canadian provinces. i believe in heat pumps as the solution, but insulation needs to improve first.

We will have a video on heat pumps coming in the beginning of next month so stay tuned! ✨

@@DWPlanetA great! Please go into detail about the different types (vertical ground source vs horizontal ground source vs air source.) I believe vertical ground source heat pumps are the most efficient and reliable, with the only barrier being finding an installer that has the vertical drilling equipment. But I am excited to see your video. :)

zero-gap semimetal semiconductor. It can be metallic or semimetallic and semiconducting depending on the orientation

She cool.

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Glad it was helpful. 🌈 If you want more videos like this every week 👉 make sure to subscribe to our channel! ✨

Silicon is more abundant in nature but also the elements needed to form perovskite crystal structures are abundant enough - so there should not be any problem with these in terms of production. Stay tuned for our video on perovskite and solar technology coming up really soon! 🌞 You can subscribe to our channel to make sure to be notified on new videos.

That's not true.

Great to hear, thanks.✨Make sure to subscribe to our channel for new videos on environment on Fridays! 🌞

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Actually, a logarithmic scale on the y axis is quite common for visualizing exponential functions - specifically because the graph then looks linear, thereby proving the function is really exponential.

From 4:45 we start to explain the bandgap. The smaller it is - the more energy is lost as heat. Wider bangap allows for better control, reducing the likelihood of electrons leaking over the strip plate when they shouldn't. 🛞

Please check out our channel as we have many videos looking at carbon from different ankles. Here couple of them you can start with. 🙌 ✅ "Why carbon offsets are worse than you think" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-61SWIYwCaSE.html ✅ "Can carbon capture ACTUALLY work?" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-JHs-eWHb16g.html

There materials that perovskite crystal structures require are very abundant. We release a video on them today so stay tuned! ✨🙌

If you mean micro silica (silica fume), it is primarily used in construction industry. For solar panels, the silicon has to be highly purified silicon to create the semiconductor material.

Silicon and silicone are not the same thing...