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PlotRatio t1_j5nx2iy wrote

Reply to comment by theredhype in What are the forces on Earth’s Inner Core that change its speed? by BayRunner

But its a static pressure isn't it?

Otherwise something highly compressed would radiate heat indefinitely which ain't going to happen.

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Unlimited_Emmo t1_j5nxb27 wrote

Yes, somewhat, there are fluctuations but mainly the earth is hot, it was heated by the pressure, and is now cooling down.

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silent_cat t1_j5o5oeb wrote

> Otherwise something highly compressed would radiate heat indefinitely which ain't going to happen.

Sure, the earth is cooling down. The mantle however is a reasonably good insulating layer though (mostly because it's so damn thick). The heat loss is is estimated at 47±2 TW (or about 3 times to total energy usage by humans). Still, the Earth will be destroyed by the Sun before it cools down.

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PlotRatio t1_j5o8h0c wrote

Sure, I agree with all of that.

>Gravity causes the pressure. It’s the weight of everything above pressing down, which naturally increases the deeper you go which really isn't the case as no work is being done.

I just read the above as suggesting that a static pressure will result in an increase in temp.

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