this post was submitted on 09 Feb 2025
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted, clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts: 1

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If you made it this far, showerthoughts is accepting new mods. This community is generally tame so its not a lot of work, but having a few more mods would help reports get addressed a little sooner.

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[โ€“] xigoi@lemmy.sdf.org 11 points 1 day ago* (last edited 1 day ago) (1 children)

How would you run a car on water? Water is spent fuel.

[โ€“] Tehdastehdas@lemmy.world 2 points 1 day ago* (last edited 1 day ago)

If you're in a dry, hot environment and evaporate water in a swamp cooler, you lose about 2.3MJ/l (0.6kWh/l), from which you can skim maybe ~10% (0.06kWh/l) with a thermocouple. If you're charging a Dacia Spring consuming 156Wh/km, you'd have to evaporate ~300 liters of water to drive 100km. (Edit: some errors.)

https://en.wikipedia.org/wiki/Enthalpy_of_vaporization#Other_common_substances
https://en.wikipedia.org/wiki/Thermoelectric_generator#Efficiency
https://ev-database.org/cheatsheet/energy-consumption-electric-car

But then, what if you bought solar panels and a wind turbine instead of thermocouples and water?