Recent comments in /f/explainlikeimfive

nmxt t1_iuhem3m wrote

Liquid water evaporates at all temperatures, so puddles disappear because they evaporate. The evaporation is somewhat faster with higher temperatures and slower with lower temperatures. Evaporation happens from the open surface of water. The larger the surface, the faster the evaporation. For this reason a puddle evaporates faster than the same volume of water in a glass. Boiling, however, happens throughout the entire volume of water at the same time, and is therefore much faster than simple evaporation.

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twotall88 t1_iuheiwc wrote

>Water starts evaporating at anything above zero Celsius at sea level and 1 atmosphere of pressure

Water will sublime from solid form (ice/snow) well below zero Celsius (32°F). It just takes a sunny, dry day and the sun will give the water molecules enough energy to skip the liquid stage (sublimate). It can be considered evaporation loosely.

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JaggedMetalOs t1_iuhe9nb wrote

The special telomere repairing protein (telomerase) is active in Humans. It's what resets the telomere length in embryos, and it's also active (but not enough to fully replenish them) in any body tissues that need to regenerate.

One place it's fully active is in cancer cells. It's theorized one of the functions of shortening telomeres is to prevent cancer, because any cancer starting to grow will burn through its telomeres and die, unless the cancer cell is able to mutate to repair its telomeres.

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drafterman t1_iuhe3iu wrote

Because boiling isn't evaporating. Water boils at 100 C but can evaporate at any temperature above 0 C.

The temperature of some amount of water is basically the average kinetic energy of its molecules. Some molecules will have more energy and some less.

Some of the molecules with more energy will be at the surface.

And some of those high-energy surface molecules will have enough energy to overcome the surface tension of the water and pressure of the air above it and shoot off into the air.

This is evaporation.

So, over time, any body of non-frozen water will slowly evaporate.

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ekkidee t1_iuhdm5u wrote

It would seem that at the equator, on the equinox, the sun would indeed travel a line from due east to due west, directly overhead. Such a line would have no inclination and wouldn't be affected by Earth's tilt since the concepts of due east and due west are affected to the same degree.

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RaijinOkami t1_iuhdh4f wrote

One good reason (one version of) the Metaverse failed is cause apparently no one seemed to realize that NOBODY is gonna spend 18 hours a day wearing a VR headset that is JUST heavy enough to possibly kink your neck and only lasts MAYBE 3 hours on a charge to live in a VIRTUAL mansion while getting ham-fisted for rent in the real world

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vferrero14 t1_iuhdfjw wrote

It's also simpler and weighs less, especially a V8 with double overhead setup. The four cylinder overhead cam isn't as bad cause you just have two instead of any V config will have 4 cam shafts. Weight can effect fuel economy and simple (pushrods) always has its own benefits.

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Helmut1642 t1_iuhdd8x wrote

Why, apart from their job was fighting in wars and jousts was good training but it was also a way to make a lot of money! many jousts with big melees or massed fights in teams allowed opponents to be captured and ransomed. Even if that was not allowed there were often valuable prizes and for unknown knights and those without a holding it was a good way to show good you were making it possible to gain a position in great lords household. So knights went from poor landless knights to in one case the Marshall of England, based mainly on his fame and wealth from jousting.

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