Chemistry
Kinetics is the study of:

All of these are correct
How fast the reactions go
The mechanisms and paths of the molecules take in joining from one reactant to products
The rate of chemical reaction

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Chemistry
The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Interrupted release of moisture from the material
Tendency of carbon dioxide to form a layer along with dust smoke
Accumulation of smoke and dust over the sigrees
Lack of oxygen in the surroundings of sigrees

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