Water boils and if it cooks too long evaporates ( science) into a gas. It is not flammable. Oil on the other hand is flammable and will "fry" what-ever is put into it. Anything can cook in water ( vegetables, meats, fruit) but it is boiled.
Animal fats tend to go rancid with time. Vegetable oils will too eventually, but have a longer shelf life.
An iron frying pan is made of iron, which is an element. Therefore, the iron frying pan is not a mixture or a compound, but rather a pure element.
Corn is considered a vegetable, specifically a grain vegetable, rather than a fruit.
cooking, fuel, cosmetics, medicines, lubrication, softening lather and so on. rather depends on the type of oil, animal, vegetable or mineral.
shallow frying means the food to be fried should not be completely dipped in oil while frying. For this, a flat pan is used rather than a deep bottom pan.
ratatouille?
No, they are not. French-fries is junk food.
The term "vegetable" is rather ambiguous, depending on the forum one is addressing however for practical purposes, an onion is a vegetable.
You sure can - McDonalds does it all day long. It's rather messy, though, even if a spatter shield is used atop the burgers, so a frying pan is probably a better choice.
No, Hanover salad is not a vegetable; it is a type of salad that typically includes ingredients like diced vegetables, fruits, and sometimes meats or nuts. The specific ingredients can vary, but it is primarily a dish rather than a single vegetable. The name may refer to a regional style or recipe rather than a standalone vegetable.
Cooking always leaches some of the nutrients of any vegetable. The longer a vegetable is cooked the more nutrients are leached into the cooking water. In that "raw" has the benefit of supplying all of the nutrients available in all vegetables it is better. Depending on the application, it is preferable to steam a vegetable only until it is "Fork Tender" and attains a brightness of its natural color. By cooking with steam rather than boiling in water, fewer of the nutrients are leached.
Pickles are generally made from cucumbers. Cucumbers are not a tuberous vegetable, rather they are the fruit of a vine or bush related to melons.