In various places around the world, coal is a cheap fuel used for heating,
cooking, and industrial applications such as refining metals, generating
electricity, and powering ships and trains.
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Mostly it is not used every day.
Prime example of radiation in our every day life is the heat we get from the sun (mostly radiation heat)
the shape of cuboid can be used in designing buildings
Anywhere, at any time. Architects, chemist, engineers...
It is similar to your body or a cup you drink every day