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Cake day: June 2nd, 2023

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  • The earth’s core is about 5500C and is mostly composed of iron and nickel, probably. Presumably, it would shrink tremendously going from 5500C to 0C so in theory you could calculate the rate of shrinkage using iron’s rate of thermal expansion. However the core is also under immense pressure which makes iron much denser (smaller) than on the surface of the earth. The immense temperature and pressure is a result of the action of gravity pulling the core onto itself.

    The short answer I think is the earth cannot exist as we know it at anything below its core temp of 5500. Suppose we waved a magical wand that set it’s temperature to 0, it would implode on itself (along with the rest of the planet) and heat right back up to its current core temp of 5500 before you could measure the effects of thermal expansion.





  • You crave salt and fat because your body needs a little bit of these things to survive, but finding salt and fat out in nature is really really hard, so those cavemen that liked the taste of salty or fatty foods enough to make the extra effort to find those foods were more likely to survive to be your ancestors and you inherited that behaviour. That’s why you like McDonald’s, it’s full of the salt and fat that is hard to obtain if your diet consists of mostly roots and mushrooms and leaves.

    McDonalds is bad for you because it’s unnaturally full of salt and fat. Far, far more than your body needs and far more than your cavemen ancestors would have eaten naturally. Especially if you eat McDonald’s often. Too much of anything turns that thing into a poison.

    McDonald’s has only been around a generation or two. That’s not enough time for the people who crave McDonalds and eat too much of it to die off, leaving mostly people who don’t crave McDonalds to remain.





  • The amortization length affects proportion of principle paid down, but it doesn’t eliminate it entirely. At the same interest rate, you end up having paid more in interest at maturity of a longer amortization, yes. In practice, this can be mostly mitigated by negotiating a lower rate, or negotiating and exercising prepayment privileges.

    More importantly, with a mortgage, ownership of the property is yours entirely, from day one, not the lenders’. What you owe is cash, not the property. The property is merely collateral in the event of default of payment.

    BTW, multi generational loan agreements are not new. They are somewhat common historically and in other places of the world. For the same reason that multigenerational housing is the historical norm.







  • SkyNTP@lemmy.mltoUnpopular Opinion@lemmy.worldAmerica needs to collapse
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    3 months ago

    A few hundred billionaires own more than the majority of Americans.

    I think your assertion is factually incorrect. Or at least significantly overestimates how much ordinary Americans actually get to participate in America.

    I think for most people, America has already collapsed, and that is exactly why they voted for Trump.



  • The plastic (including polyester fabrics) in your car was most likely derived from petroleum. The car parts were most likely shipped around during manufacturing using combustion engine vehicles. The energy to cast those car parts, probably some of it comes from non renewables. The labour to build the car almost surely comes from other people who consume gas (for example to drive to the EV factory)

    That “100%” renewable energy? The installation and maintenance of it was/is almost certainly done with large industrial equipment and vehicles burning fossil fuels. (Similar issue with production of parts).

    Look, I’m not saying you aren’t making positive choices by choosing renewable options. What I am saying is, while they are more renewable, they aren’t truly 100% renewable when you factor everything involved in it. Fossil fuels are so pervasive in society, it’s virtually impossible to both function in a modern society and not contribute to the consumption of fossil fuels.


  • I think the design philosophy is that each tile represents no more than a single entity at a time, and compact enough that you can arrange the entities in a section to represent a device, room or group.

    In your example, perhaps the room also has a humidifier and/or heater. So in reality, the room temperature entity isn’t truly tightly coupled with the fan. The heater and or humidifier are also a part of the whole.

    With tiles, you are in complete control to arrange groups of entities that represent a larger whole, in whatever scope you like.