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I don’t know if it’s a stupid question or not but I have been wondering this myself for years. :)
These are all word for word the same answers to the not poop for 3 days quest.
Cold doesn't exist, it is merely the absence of heat. Easier to insert heat than remove it, same reason why you can put on warmer clothes in the winter, but you can't make yourself cold in the summer.
Besides freezers I don’t think there’s any technology we know that could do this on a wide range of substances. But freezers are neat - they move heat from the inside to the outside and as they are insulated they can reach temperatures 40-50 degrees (Celsius) under their surroundings
a can of soda can cool faster in the freezer for ~30 min.
some people suggest adding an insulated sleeve.
i also use freezer to cool down coffee quickly.
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I've been wondering this for my entire life
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.