Heat gets tribed trapped under the a piece of glass or plas plastic covering the top of the cooker.About sellven A box oven is a fective effective for slow cooking of large amounts of food.
Using carburizing agent and devulcanized agent,experiment of carburisation and desulphuration for semisteel which in smelting high titanium slag by electric cooker has been studied.
I'd invented an automatic gate closer out of cement-filled tires, a solar cooker that didn't work very well out of an umbrella and tinfoil, baking-pan alarms to entrap my siblings.
At home, his mother allowed him to have a workshop in their garage, where he built a solar cooker, a hovercraft, and even installed a security alarm on his bedroom door.
But, the science behind these things: how wood burns, how airflow works, if you start thinking about fluid dynamics inside of a cooker, then science has a pretty huge part of it.