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Depends on the Cubic Feet per Minute of Air the unit moves. But typically 6 inches is good.
A convection oven moves the air, a microwave does not.
The proper air gap clearance for that model is 0.020"
clearance between door and floor with forced air system
Yes, this Jenn Air microwave oven does have a turntable for you to place food on.
Phase to phase clearance should be around 11.5 inches.
the air in the container expands
Popcorn popped in an air popper as opposed to microwave or stovetop.
A convection oven moves the air, a microwave does not.
Yes, you can heat air in a microwave oven, but the appliance isn't good at doing that. There are a few reasons for this. First, the microwaves will most effectively only heat the water vapor in air or water in something in the cavity (the cooking area). That means that thermal energy transferred into water vapor or something in the cavity that has water in it will have to be transferred to the air to heat that air. We also know that a microwave has a fan in it to keep the microwave generating component cool. The air is heated as it cooles the device, and that warm air is then ducted through the cavity and out another side of the oven. This happens continuously. The air in the cavity is constantly being "replaced" with other air. Heating air in a microwave is not something the device can do well.
No.
the air molecules spread out