The Physics of Hot Pockets
StartsWithABang (3485481) writes "You've all had the experience: you're all excited to microwave your favorite snack. So you pull it out of the freezer, you throw it in, and you let it rip. A minute or two later, you pull it out, and there it is: boiling on the outside, frozen in the middle. Finally, a physicist answers the eternal question: why do microwaved foods remain frozen on the inside when they reach scalding temperatures on the outskirts? Starts With A Bang explains the whole phenomenon. Bonus for the crisping sleeve explanation!"
Also those with rotating microwave trays (because microwaves tend to heat unevenly) ought to be aware that anything at the center of the tray will not get the benefit of rotation and heat at the same rate the entire time. To roll around in a (relatively) even distribution, none of your food should sit in the center of the tray.
a microwave with more than 300 watts of power. I've never had the issue of hot outside/cold inside, my problems have always been of the hot outside/nuclear inferno/solar coronal mass ejection on the inside variety, regardless of where I've microwaved them. I don't even follow the instructions on the package very closely, just pull it out of the wrapper, put it in the sleeve, toss it in, slap the door shut, 3 or so minutes, and out comes an external breading hot to the touch with napalm in the center. Maybe there are just a lot of broken microwaves, or even more likely, people that don't know how to use them properly?
Most microwaves have a power control. 90 seconds at power 2 or 3, wait 1 minute. Flip, 1 minute at full power. Wait 3 minutes. Serve.
There exist websites and books devoted to this appliance and how to use it correctly. This is a non-story.
Caveat: there are some nice physics going on in the explanation but only for the layman. Look elsewhere for the gritty detail we /.ers are used to seeing.
Ever notice that Cobra Commander sounds an awful lot like Star scream?
I've never had a problem with Hot Pockets: Follow directions, learn how it works in a given microwave oven, and...done: Ridiculously-hot cheap, bubbly, unhealthy goodness.
Meanwhile, I don't need to read TFA to learn how the powdered aluminum wrapper turns RF energy into thermal energy. And I don't need TFA to know that any thing has a certain reluctance toward changing temperatures, as nothing is a perfect thermal conductor.
In fact: Dude, I've been cooking with a microwave since I was a little kid: It was the first kitchen appliance I was certified on other than -- maybe -- an electric can opener.
Up next on /.: How shoelaces work to keep our shoes on our feet, followed by a lesson in using a light switch to illuminate a dark room. Or "Toast: Why bread is caramelized only on the outside when using the every-day toaster."
*head in hands*
Kid-proof tablet..
Scalding on the outside and frozen inside is a feature: it's the Hot Pocket's way of telling you it really isn't proper nutrition.
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
I always assumed it was something to do with losing energy as the microwaves penetrated the substance, and I don't see how this explanation really changes that. After all, when the pocket comes out of the freezer it is ALL frozen. OK, so frozen stuff doesn't microwave easily, but then why does the outside heat first? My intuitive thought that the microwaves don't penetrate as well seems unrefuted.
Well, now I understand why hot pockets stay frozen in the middle, but the article doesn't tell me what I can do to heat it up...
Hey, if idiots wrote it then RTFM is a bad idea, OK?
Simply keep the Hot Pockets in your fridge. Then place them in your toaster oven to cook them.
Jim Gaffigan sums up my feelings on Hot Pockets.
https://www.youtube.com/watch?...
I know I'm going to eat a frozen dinner so I sit it on the counter for 10 minutes before i heat it. They heat up evenly and faster.
I also nuke for a 15% longer but at 80% power.
Of course, I also gussy frozen food up too. Adding just a teeny bit of herbs, or sour cream, more vegetables or some fresh cheese can make them quite tasty.
She was like chocolate when she drank... semi-sweet at first and then increasingly bitter.
[citation needed]
I've never seen the explanation for how a microwave works written as in your message until today. All the explanations I've seen are what's stated in the article; so I think it's your explanation that's wrong for how microwave ovens heat water.
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"We offer a Hot Pocket; the outside is boiling lava-hot and the inside is frozen solid."
"Will it burn the roof of my mouth?"
"Oh, it will destroy it. Everything will take like plastic for a week."
"I'll have the Hot Pocket."
You are kidding right? Cooking raw meat in the microwave is probably the most disgusting thing I've heard (I'm gagging at the thought).
Microwaves are useful for heating small amounts of water, and that is about it. They destroy/alter the texture and taste of food to the point of being uneditable.
Yes, I am a microwave hater.
When you've finished tearing your meat to shreds, why not add it to a chemical bath to leech out the nutrients while turning the remainder into shit? Smart people can just suck the juice of life up a straw from around the turds, while the morons out there can pretend they're enjoying their 'meals'.
1100 watt oven 3 minutes 10 seconds, without the crisping sleeve, on a paper plate, on the outside of the turntable. Let cool for a minute, or two, Eat. Better tasting fillng that way too.
So submit an article!
you learn that in physics classes normally
I used to eat 3-4 Lean Pockets a week, so I've got a pretty good idea what I'm talking about: I've never had the problem he describes with the outer portions being lava-hot but the center being frozen. This has been so across 3 different microwave ovens, one of which was an ancient late-'80s unit made when turntables were a premium feature and you set the time with a dial.
My secret? Following the goddamn directions on the box and adjusting for the microwave's rated power. The directions are usually for a 1000 Watt microwave (some products calibrate for 1100W for some reason). That's what my current unit is, so that's easy. If the microwave is 900W, you nuke the food for 10% longer, so if the directions call for 3.5 minutes you convert that to seconds (210) and add 10% (21), giving 231, then convert that back to minutes and seconds, which is what the microwave groks (3 min 51 sec). Stupid easy.
I have had the author's described problems when heating up leftovers, especially stews.
Hail Eris, full of mischief...
E pluribus sanguinem
Microwave bacon.
Seriously. This coming from a bacon lover who saved the rendered bacon lard from all his bacon frying adventures. Once you go microwave bacon, you never go back. Perfectly crispy every time.
But you don't get to save all the bacon lard, unfortunately. Good thing I still have a solid 8 oz. left from my frying days.
Chuuch. Preach. Tabernacle.
Part of the problem is that those shoes also don't last long enough to earn after-market laces. I have replaced original-equipment faux laces on new shoes with good results.
They feared that it could be used to suppress protest or support unpopular rule.
I'll second that statement. Microwaving is especially nice for me because I can make the bacon crispy without having to char it, which was always my pet peeve about bacon.
A reasonable compromise is to stuff the skin around the neck area. Extra stuffing can be rolled into balls and cooked next to the bird (the bottom tends to get a little soggy but tastes great)
I thought every college student knew that.
Mind you, Hot Pockets are nasty. Lean pockets are slightly less nasty.
Oliver's law of assumed responsibility: If you're seen fixing it, you will be blamed for breaking it.
I'm aware of the rack, but I've already got way too much shit in the kitchen. One day, it came down to the microwave bacon rack or the immersion blender, and I decided the immersion blender was way more valuable to me.
That being said, wringing out the paper towels would be blasphemy. By that point, the lard has already been tainted with that paper towel flavor. Don't ask me how I know.
Chuuch. Preach. Tabernacle.
Or you can stand your turkey on it's head (or where it used to be) and spoon the stuffing into the carcass..
He tried to kill me with a forklift!
Finally someone who got it right. GP is wrong about the Joule heating; ultra-pure water with near-zero conductivity heats just fine in the microwave, as do oil and dry carbohydrates, and insects do die if they don't manage to go sit at a node in the standing wave, only they seem to actively seek these nodes by moving to where it feels least hot. That said, it seems plausible that there is some joule heating in actual food, and it could even help explain some weird heating patterns; it's just not the most important contribution overall.
TFA at the very least used unfortunate wording suggesting rotational resonance, which would also be wrong. This is a pervasive urban legend even amongst people who should know better, and can even be found in some entry-level textbooks (see the scan in TFA). The misconseption is based on the fact that molecular rotations for gases are indeed located in the microwave spectrum. However, molecules don't really rotate freely in the condensed phase (and the peaks for water vapor are at 22.2 and 183GHz anyway so the frequency of the microwave oven would be far off). Dielectric heating is the only correct explanation. That said, it does seems plausible that the dielectric heating of liquid water is more efficient than that of ice because of the more persisten hydrogen bonds, so TFA probably got that part right.
In summary, both GP and TFA got their basic mechanism wrong but contain some good arguments nevertheless.
Here's a test for you: ever notice that a fly in the microwave survives?
Not longer than 3 seconds. https://www.youtube.com/watch?v=Kdsyq6RnjO4
jason.arthur.taylor at gmail dot com;240-471-5613. I respond to all emails, if only with "ok." If I did't respond, I did
WideGlide? Sounds like goatse lube. Whoever approved that name really fucked up.
Do you even lift?
These aren't the 'roids you're looking for.
I've never ever experienced a Hot Pocket that was anything less than flesh-searing hot on the inside.
That said, TLDR: Energy is supplied to the outside faster than it can be conducted to the inside of the food.
I'm too lazy to count, but I'm pretty sure that would fit in a tweet, and hopefully it was a "no shit" situation for 99% of people with brains. Essentially it's the same reason a steak can be burnt on the outside and raw on the inside.
https://www.eff.org/https-everywhere
well that was informative in the extreme and changed my mind about the subject, an exquisite application of the four classical syllogism forms
Perhaps you missed the direction about cooking the hotpocket inside the crisper it comes with in a 1100 watt microwave oven; preferably in a microwave with a rotating carousel. Or possibly the direction to let it sit for 5 minutes after cooking.
A minute or two later, you pull it out, and there it is: boiling on the outside, frozen in the middle. Finally, a physicist answers the eternal question: why do microwaved foods remain frozen on the inside
Because the microwaves are high energy, they are absorbed or dispersed near the surface, when they come into contact with compounds such as water.
The heat takes much longer to conduct through the material, than microwaves take to hit the material, therefore: the center takes longer to be heated.
Would microwaving frozen food in a vacuum (or conversely under high pressure) make any useful difference in how evenly the food cooked? A lower pressure would lower the boiling point and a higher pressure would raise it. What about subtly modifying the wavelengths or amplitude? I'm not a physicist so I have no idea. Just throwing that out there to see if someone smarter than me can make it stick.
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would be nice if some politician would call out nestle on their marketing to embarrass them. or maybe some weird lawsuit would help. like with oreos. http://www.cnn.com/2003/LAW/05...
Welcome to Costco, I love you.
"Why does a ham and cheese hot pocket have so many ingredients? --because chemicals are cheaper then real food.
Welcome to Costco, I love you.