search results matching tag: convection

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (10)     Sift Talk (0)     Blogs (1)     Comments (20)   

No joking around about the turkey

My_design says...

I brined a 14 pound turkey and roasted it in a convection oven after putting rosemary, sage and thyme butter under the skin. Took it to my mother-in-laws. She usually cooks, now I'm a little worried I showed her up... But my wife said it was the best she'd ever had and I was happy with it.

shinyblurry (Member Profile)

RFlagg says...

Fuck the Lord. I'd rather me and my children burn in Hell for all eternity than be around his people for all eternity. People who'd rather help the rich than help the needy and poor. People who'd rather see my child with Asthma die than have their tax money or insurance premiums go up so that he could be covered. People who are so full of hate they favor Nazis over black people. Because none of them have any convection in their heart over any of that. They voted for a guy like Trump, thinking that is what Jesus would do. Fuck his people, and fuck him if he won't convict them over their anti-christ ways... which is what the whole Republican party is, the anti-christ... if there were such a thing.

shinyblurry said:

The Lord loves you and will forgive you for everything if you will turn and come back to Him.

Luke 15:11–32

The Perfect Croissant - Gordon Ramsay in Paris

chingalera says...

If Ramsey wouldn't touch croissants and needed lessons form a tenured pastry chef, I don't feel so bad for always being concerned about wasting all that butter having never tried.
Now do a batch without a pastry roller and a commercial convection oven, and see how much fun you have!

Evaporating Water Experiment at -41°C/F

GeeSussFreeK says...

http://math.ucr.edu/home/baez/physics/General/hot_water.html

http://en.wikipedia.org/wiki/Mpemba_effect

The "Mpemba effect", hot water freezing faster than cold water, is not currently well understood. Some possible explanations are (summed up from above reading).

Evaporation of hot water is a heat transport method out of the main body of liquid, causing a super cooling effect.

Convection currents in warmer water might spread around ice crystals faster.

Frost effect will tend to cause a generally slow freezing from the top instead of warm water from the bottom and sides

None of these give a full account to the phenomena and each has been individually ruled out as the sum total of the effect. Some myriad of factors or some basic lack of insight into thermodynamics is most likely the culprit.

The short of it is...no one really knows.

Aziraphale said:

WTF?!?!? How is this done?? Someone please physics me.

Misconceptions About Temperature

raverman says...

@GeeSussFreeK that's a brilliant idea.

I'm gonna make millions! It's like a George foreman grill, with copper sheets on springs (for contact but not pressure) with little fans top and bottom adding gentle convection of temperature controlled air.

Watch out Infomercials here i come!

Quick Tip: How to Make Perfect Bacon Every Time

Auger8 says...

I have worked in many kitchens in my time and I agree the best way is to bake it or grill it but even when I worked the grill at the steak place I worked for I usually just threw a pan in our convection over for 3 mins and BOOM 50 slices of bacon done and perfect in 3 mins. Mmmmmmm Bacon!

How to permanently fix "global warming"

jwray says...

Another thermodynamic possibility for reducing global mean temperature is using wind/solar power to shoot giant lasers into space. But it may be a wash due to solar power's effect on albedo and wind power's effect on convection. Hydroelectric power would be legit for that but not available in sufficient quantity to make a difference.

Cruel, unusual punishment of WikiLeaker, Bradley Manning

RFlagg says...

Nobody said you have to be ashamed of your country. You just have to respect the Constitution, which gives certain rights if you are awaiting trial or not, and most of those rights don't go away if you are guilty, the privileges yes, the rights no. How is asking him to be treated with the respect the Constitution demands being unpatriotic? If anything, it is the very definition of patriotic, sticking up for the Constitution even when others think it should be ignored. All people are asking for here is that the government be transparent about their treatment of him to be sure his rights granted by the Constitution and International law are being protected.
It is those here who call for Julian Assange to be sent here for trail that could be called unpatriotic. He did the job the media is supposed to do, and is the very reason the freedom of the press clause exists in the 1st Amendment: to act as a check and balance against government corruption and violation of international laws and treaties.
And when the public knows about such treatment in other countries, then people here complain as well. Perhaps not the people you listen to, or the major media outlets, but the Real News, Democracy Now and other independent non-corporate, pro-humanitarian media do.
If he is guilty then yes, he should spend his life in jail, nobody would argue that, but he should be treated humanely with his full Constitutional and International rights before and after said convection.

The Energy Problem and How to Solve it - MIT Prof Nocera

jwray says...

Almost all energy consumed by households is avoidable waste:
* think about the way you fry eggs. 99% of the heat from the burner is going into the air, not into the eggs. This should be solved by using small device that is well insulated on all sides and has an internal heating coil.
* Ovens have a high heat capacity and shitty insulation. More energy is wasted on heating up the oven itself than actually goes into the food. This could be solved by lining the inside of the oven with silica aerogel instead of metal. If an oven is properly insulated it will not feel very warm to the touch on the outside, even after being on for an hour.
* Most of your heating and cooling energy leaks out the windows -- if their inside surface feels significantly above or below ambient during extreme weather, your heating and cooling energy is being wasted and hemorrhaging out the windows. It would literally save energy to have a webcam on the roof and display that image on an LCD inside instead of having windows, if you live in a climate with extreme temperatures (especially in cold climates, as the energy used for the LCD would contribute to heating the house). All ventilation needs can be accomplished through a small portal with a fan (and a heat exchanger, of course).
* Hot water is produced very wastefully by just dumping energy into it instead of using a thermodynamic cycle to transfer heat and produce something cold as a byproduct. Hot water could be co-produced with cold water for AC / Refrigeration much more efficiently than doing them all separately.
* Hot water goes down the drain. This should at least go through a heat exchanger, which would dramatically lessen the amount of work that has to be done to heat up new hot water. A 7 Liter per minute showerhead putting water 30 degrees F above ambient down the drain is wasting over 8135 watts as long as it is running. However, I don't know of any houses yet designed with a heat exchanger between the shower drain water and the intake of the water heater.
* Fluorescent lights. Duh. Incandescent bulbs should be banned.
* Freezers built with the door on the top will waste much less energy to the convection of air when opened, for obvious reasons.

Here ends the lifestyle-neutral list of suggestions. The following would involve sacrificing something:

* Reduce excessive lighting -- if people wouldn't fuck up their retinas by driving just after sunrise or just before sunset, or seeing specular reflections of the sun on shiny cars and buildings outdoors, they wouldn't need such bright lights indoors. A 1 watt LED is plenty for reading. Sunlight could be used in the daytime instead of artificial lights.

Will a Lava Lamp Work on Jupiter

therealblankman says...

I'm not at all convinced that what we are seeing here are the convection currents that normally drive a lava lamp, rather I think it more likely that we're seeing eddy currents created by a badly balanced centrifuge which results in uneven acceleration inside the lava lamp bottle.

Still, huge upvote for making a Meccano centrifuge in the dining room.

Energy and waste (Blog Entry by jwray)

jwray says...

You can get huge sheets of clear plastic from hardware stores like home depot. They're advertized specifically for insulating windows. Whatever air there is between the window and the plane of the wall will be sealed off by the plastic, preventing convection. Air is a pretty good insulator when its flow is blocked. They usually come with a roll of clear double-sided tape.

The Sun In Action

honkeytonk73 says...

You can see solar flares, spots, and surface convection in a backyard telescope. Though you NEED proper equipment and knowledge how to do it properly!!!

NEVER POINT A TELESCOPE AT THE SUN. Unless you know exactly what you are doing. Ever burn a leaf with a magnifying glass as a kid. Imagine that 100x plus in strength on your eyeball. You will be instantly and permanently blinded.

A scope with a solar filter (Baader Solarfilm or properly filtered glass elements) for very low cost, shows sunspots. Not real solar surface detail, no corona. No flares.

Unfortunately the best visuals is with some rather pricey Hydrogen Alpha filtering equipment. But a few grand invested gives beautiful flare/surface detail. Coronado was one company that manufactured those things, but I haven't looked them up in a long while. Not sure if they are still around.

As you might imagine, you don't need a large aperture telescope. A small refractor sized scope is plenty big. Your goal isn't to collect more light, which is what larger scopes do. You want to get enough light, but you will be blocking out most of it with the specialized filters so you don't fry your eyeballs.

If you are interested and don't know where to start. Contact your local Astronomy club. Every nation has clubs somewhere. Not sure? Contact your local university's astronomy dept. They will know for sure. Heck, someone at the club or university likely owns one of these things so you can see one in person. Even better, search the internet.

Giraffe running from a twister

therealblankman says...

Not really a "twister" in the sense that the term normally applies to a tornado. Tornadoes are generated from large thunderstorms- hardly a cloud in the sky here. It's really a dust-devil, caused by local convection currents. Not powerful enough to do a whole lot of damage to people or property, but there is a danger from the flying debris it might carry if it thwacks ya'!

A real shooting star - Mira leaves a 13 light-year tail

deathcow says...

Astronomers are not totally sure about the ultraviolet fluoresence of the Mira trail. They think the bow shock of this star (the star is travelling at almost 300,000 miles per hour relative to the matter the star is colliding with) is producing enough heat to cause the gas to fluoresce. Think HUGE amounts of REALLY hot matter spread out in a gigantic tail in an environment with little conductive or convective heat loss. This thing would glow for a long time. (Like nebula surrounding the remains of a supernova where only the released energy of the event long ago has the shells of gas still glowing.)

Experiment: Tia Maria and Cream, Amazing Reaction



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon