A loosely moderated place to ask open-ended questions
Search asklemmy π
If your post meets the following criteria, it's welcome here!
Looking for support?
Looking for a community?
~Icon~ ~by~ ~@Double_[email protected]~
These are all word for word the same answers to the not poop for 3 days quest.
It occurs to me that you could get some really high-speed cooling with liquid nitrogen (or dry ice and alcohol) but the reality of working with cryogenic fluids is that they're pretty dangerous so I don't think anyone would do that. Unlike a microwave where the dangerous part (the waves) is all self-contained and turns off the instant you open the door.
That's an air conditioner. Or a fridge.
You just need to adjust the output and input sizes. Do to like... physics. It is easier to add heat to a system than to remove it.
Removing heat energy is what your freezer does, by transferring it outside of the freezer box.
You canβt just remove heat by adding electromagnetic energy. Absorbing energy from the electromagnetic radiation makes heat.
Edit: whelp, TIL
Fridge, well. But now I'm wondering if that would be possible with electromagnetic radiation somehow. Would it be possible to direct infrared waves away from a closed chamber, making the inside cooler? Like a semipermeable membrane in shoes with water vapor?
I donβt know if itβs a stupid question or not but I have been wondering this myself for years. :)
Yeah there are those machines that like instantly cool your soda can or make ice cream instantly supposedly. They just bathe it in ice and salt water for some time basically
yeah, not only microwave but heater in general... but reversed, i asked myself that question for a long time, i mean we pump an electricity into the wire and we get heat, why not reverse? why we can "magically" get heat from electrons but to get something cold we need to pump the heat elsewhere, like microwave basically make atoms vibrate generating heat, would be cool to be able to generate some field that makes atoms stop
Heat is energy release, your start with stored energy and release it. To make something cold you either have to capture energy (hard) or move it away (heat pump / refrigeration)
Laser setups that can cool individual atoms exists but they're not trivial whatsoever and they cool them by canceling atomic movement by hitting them with lasers opposing their current momentum to slow them down (cooling). It can not be scaled up in any practical way.