Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by hliyan on Sunday August 12, 2018 @06:41AM
(#17743829)
As I understand, temperature is a measure of how fast atoms and molecules are vibrating, and not a measure of how much energy per unit area of contact can be transferred in a unit time.
[ Parent
| on HN ]
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by guidedlight on Sunday August 12, 2018 @06:50AM
(#17743843)
Exactly.
Stick your hand into an oven at 100 celsius ...OR...
Stick your hand into into a pot of water at 100 celsius.
The difference is that the water molecules are more tightly packed, than the air molecules in the oven. In space, they are quite far apart.
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by mpweiher on Sunday August 12, 2018 @06:56AM
(#17743856)
> Stick your hand into into a pot of water at 100 celsius
..and: please don't! :)
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by sebazzz on Sunday August 12, 2018 @11:24AM
(#17744723)
Fast reflexes will prevent major damage. It won't prevent pain though.
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by jacquesm on Sunday August 12, 2018 @07:58PM
(#17747157)
As someone with extensive scarring on one arm from a water burn I'd prefer it if you didn't put things like this out there.
Fast reflexes won't help your hand to recover from a bad burn, they won't prevent it either, your hand is much too large to be immersed fully and retracted before substantial damage will occur.
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by mcbits on Sunday August 12, 2018 @04:11PM
(#17746186)
Maybe for a fingertip, but I wouldn't try it with a full hand. The water stuck to the hand will take time to cool down no matter how fast you remove it. Unless you're just saying second degree burns don't count as major damage...
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by kenjackson on Sunday August 12, 2018 @12:37PM
(#17745120)
Is that also a reason that you feel warmer in high humidity heat?
Re:Traveling to the Sun: Why Won’t Parker Solar Probe Melt?
by tgb on Sunday August 12, 2018 @01:14PM
(#17745300)
That's only part of it - sweat not being able to evaporate is another part. I'm not sure which is the bigger effect.